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  <title>CSS - Knowledge</title>
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<meta property="og:description" content="伪元素1234567891011&#x2F;&#x2F; first-of-type 选择每个p元素是其父级的第一个p元素&#x2F;&#x2F; last-of-type 选择每个p元素是其父级的最后一个p元素&#x2F;&#x2F; only-of-type 选择每个p元素是其父级的唯一p元素&#x2F;&#x2F; nth-of-type(n) 选择每个p元素是其父级的第n个p元素&#x2F;&#x2F; nth-last-of-type(n) 选择每个p元素的是其父级的第n个p元素，从最">
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  <style>
    /* 首屏样式 */
    #safearea {
  display: none;
}
:root {
  --color-site-body: #f4f4f4;
  --color-site-bg: #f4f4f4;
  --color-site-inner: #fff;
  --color-site-footer: #666;
  --color-card: #fff;
  --color-text: #444;
  --color-block: #f6f6f6;
  --color-inlinecode: #c74f00;
  --color-codeblock: #fff7ea;
  --color-h1: #3a3a3a;
  --color-h2: #3a3a3a;
  --color-h3: #333;
  --color-h4: #444;
  --color-h5: #555;
  --color-h6: #666;
  --color-p: #444;
  --color-list: #666;
  --color-list-hl: #30ad91;
  --color-meta: #888;
  --color-read-bkg: #e0d8c8;
  --color-read-post: #f8f1e2;
  --color-copyright-bkg: #f5f5f5;
}
* {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  outline: none;
  margin: 0;
  padding: 0;
}
*::-webkit-scrollbar {
  height: 4px;
  width: 4px;
}
*::-webkit-scrollbar-track-piece {
  background: transparent;
}
*::-webkit-scrollbar-thumb {
  background: #3dd9b6;
  cursor: pointer;
  border-radius: 2px;
  -webkit-border-radius: 2px;
}
*::-webkit-scrollbar-thumb:hover {
  background: #ff5722;
}
html {
  color: var(--color-text);
  width: 100%;
  height: 100%;
  font-family: UbuntuMono, "Varela Round", "PingFang SC", "Microsoft YaHei", Helvetica, Arial, Menlo, Monaco, monospace, sans-serif;
  font-size: 16px;
}
html >::-webkit-scrollbar {
  height: 4px;
  width: 4px;
}
html >::-webkit-scrollbar-track-piece {
  background: transparent;
}
html >::-webkit-scrollbar-thumb {
  background: #54b5a0 linear-gradient(45deg, rgba(255,255,255,0.4) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.4) 50%, rgba(255,255,255,0.4) 75%, transparent 75%, transparent);
  cursor: pointer;
  border-radius: 2px;
  -webkit-border-radius: 2px;
}
html >::-webkit-scrollbar-thumb:hover {
  background: #54b5a0 linear-gradient(45deg, rgba(255,255,255,0.4) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.4) 50%, rgba(255,255,255,0.4) 75%, transparent 75%, transparent);
}
body {
  background-color: var(--color-site-body);
  text-rendering: optimizelegibility;
  -webkit-tap-highlight-color: rgba(0,0,0,0);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}
body.modal-active {
  overflow: hidden;
}
@media screen and (max-width: 680px) {
  body.modal-active {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
  }
}
a {
  color: #2092ec;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
}
a:hover {
  color: #ff5722;
}
a:active,
a:hover {
  outline: 0;
}
ul,
ol {
  padding-left: 0;
}
ul li,
ol li {
  list-style: none;
}
header {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
}
img {
  border: 0;
  background: none;
  max-width: 100%;
}
svg:not(:root) {
  overflow: hidden;
}
hr {
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  height: 0;
  border: 0;
  border-radius: 1px;
  -webkit-border-radius: 1px;
  border-bottom: 1px solid rgba(68,68,68,0.1);
}
button,
input {
  color: inherit;
  font: inherit;
  margin: 0;
}
button {
  overflow: visible;
  text-transform: none;
  -webkit-appearance: button;
  cursor: pointer;
}
@supports (backdrop-filter: blur(20px)) {
  .blur {
    background: rgba(255,255,255,0.9) !important;
    backdrop-filter: saturate(200%) blur(20px);
  }
}
.shadow {
  box-shadow: 0 1px 2px 0px rgba(0,0,0,0.1);
  -webkit-box-shadow: 0 1px 2px 0px rgba(0,0,0,0.1);
}
.shadow.floatable {
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
}
.shadow.floatable:hover {
  box-shadow: 0 2px 4px 0px rgba(0,0,0,0.1), 0 4px 8px 0px rgba(0,0,0,0.1), 0 8px 16px 0px rgba(0,0,0,0.1);
  -webkit-box-shadow: 0 2px 4px 0px rgba(0,0,0,0.1), 0 4px 8px 0px rgba(0,0,0,0.1), 0 8px 16px 0px rgba(0,0,0,0.1);
}
#l_cover {
  min-height: 64px;
}
.cover-wrapper {
  top: 0;
  left: 0;
  max-width: 100%;
  height: 100vh;
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  flex-wrap: nowrap;
  -webkit-flex-wrap: nowrap;
  -khtml-flex-wrap: nowrap;
  -moz-flex-wrap: nowrap;
  -o-flex-wrap: nowrap;
  -ms-flex-wrap: nowrap;
  -webkit-box-direction: normal;
  -moz-box-direction: normal;
  -webkit-box-orient: vertical;
  -moz-box-orient: vertical;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  align-items: center;
  align-self: center;
  align-content: center;
  color: var(--color-site-inner);
  padding: 0 16px;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  position: relative;
  overflow: hidden;
  margin-bottom: -100px;
}
.cover-wrapper .cover-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  background-position: center;
  background-size: cover;
  -webkit-background-size: cover;
  -moz-background-size: cover;
}
.cover-wrapper .cover-bg.lazyload:not(.loaded) {
  opacity: 0;
  -webkit-opacity: 0;
  -moz-opacity: 0;
}
.cover-wrapper .cover-bg.lazyload.loaded {
  animation-delay: 0s;
  animation-duration: 0.5s;
  animation-fill-mode: forwards;
  animation-timing-function: ease-out;
  animation-name: fadeIn;
}
@-moz-keyframes fadeIn {
  0% {
    opacity: 0;
    -webkit-opacity: 0;
    -moz-opacity: 0;
    filter: blur(12px);
    transform: scale(1.02);
    -webkit-transform: scale(1.02);
    -khtml-transform: scale(1.02);
    -moz-transform: scale(1.02);
    -o-transform: scale(1.02);
    -ms-transform: scale(1.02);
  }
  100% {
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
@-webkit-keyframes fadeIn {
  0% {
    opacity: 0;
    -webkit-opacity: 0;
    -moz-opacity: 0;
    filter: blur(12px);
    transform: scale(1.02);
    -webkit-transform: scale(1.02);
    -khtml-transform: scale(1.02);
    -moz-transform: scale(1.02);
    -o-transform: scale(1.02);
    -ms-transform: scale(1.02);
  }
  100% {
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
@-o-keyframes fadeIn {
  0% {
    opacity: 0;
    -webkit-opacity: 0;
    -moz-opacity: 0;
    filter: blur(12px);
    transform: scale(1.02);
    -webkit-transform: scale(1.02);
    -khtml-transform: scale(1.02);
    -moz-transform: scale(1.02);
    -o-transform: scale(1.02);
    -ms-transform: scale(1.02);
  }
  100% {
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
@keyframes fadeIn {
  0% {
    opacity: 0;
    -webkit-opacity: 0;
    -moz-opacity: 0;
    filter: blur(12px);
    transform: scale(1.02);
    -webkit-transform: scale(1.02);
    -khtml-transform: scale(1.02);
    -moz-transform: scale(1.02);
    -o-transform: scale(1.02);
    -ms-transform: scale(1.02);
  }
  100% {
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
.cover-wrapper .cover-body {
  z-index: 1;
  position: relative;
  width: 100%;
  height: 100%;
}
.cover-wrapper#full {
  height: calc(100vh + 100px);
  padding-bottom: 100px;
}
.cover-wrapper#half {
  max-height: 640px;
  min-height: 400px;
  height: calc(36vh - 64px + 200px);
}
.cover-wrapper #scroll-down {
  width: 100%;
  height: 64px;
  position: absolute;
  bottom: 100px;
  text-align: center;
  cursor: pointer;
}
.cover-wrapper #scroll-down .scroll-down-effects {
  color: #fff;
  font-size: 24px;
  line-height: 64px;
  position: absolute;
  width: 24px;
  left: calc(50% - 12px);
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
  animation: scroll-down-effect 1.5s infinite;
  -webkit-animation: scroll-down-effect 1.5s infinite;
  -khtml-animation: scroll-down-effect 1.5s infinite;
  -moz-animation: scroll-down-effect 1.5s infinite;
  -o-animation: scroll-down-effect 1.5s infinite;
  -ms-animation: scroll-down-effect 1.5s infinite;
}
@-moz-keyframes scroll-down-effect {
  0% {
    top: 0;
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
  50% {
    top: -16px;
    opacity: 0.4;
    -webkit-opacity: 0.4;
    -moz-opacity: 0.4;
  }
  100% {
    top: 0;
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
@-webkit-keyframes scroll-down-effect {
  0% {
    top: 0;
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
  50% {
    top: -16px;
    opacity: 0.4;
    -webkit-opacity: 0.4;
    -moz-opacity: 0.4;
  }
  100% {
    top: 0;
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
@-o-keyframes scroll-down-effect {
  0% {
    top: 0;
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
  50% {
    top: -16px;
    opacity: 0.4;
    -webkit-opacity: 0.4;
    -moz-opacity: 0.4;
  }
  100% {
    top: 0;
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
@keyframes scroll-down-effect {
  0% {
    top: 0;
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
  50% {
    top: -16px;
    opacity: 0.4;
    -webkit-opacity: 0.4;
    -moz-opacity: 0.4;
  }
  100% {
    top: 0;
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
.cover-wrapper .cover-body {
  margin-top: 64px;
  margin-bottom: 100px;
}
.cover-wrapper .cover-body,
.cover-wrapper .cover-body .top,
.cover-wrapper .cover-body .bottom {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  -webkit-box-direction: normal;
  -moz-box-direction: normal;
  -webkit-box-orient: vertical;
  -moz-box-orient: vertical;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  -webkit-justify-content: center;
  -khtml-justify-content: center;
  -moz-justify-content: center;
  -o-justify-content: center;
  -ms-justify-content: center;
  max-width: 100%;
}
.cover-wrapper .cover-body .bottom {
  margin-top: 32px;
}
.cover-wrapper .cover-body .title {
  font-family: "Varela Round", "PingFang SC", "Microsoft YaHei", Helvetica, Arial, Helvetica, monospace;
  font-size: 3.125rem;
  line-height: 1.2;
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}
.cover-wrapper .cover-body .subtitle {
  font-size: 20px;
}
.cover-wrapper .cover-body .logo {
  max-height: 120px;
  max-width: calc(100% - 4 * 16px);
}
@media screen and (min-height: 1024px) {
  .cover-wrapper .cover-body .title {
    font-size: 3rem;
  }
  .cover-wrapper .cover-body .subtitle {
    font-size: 1.05rem;
  }
  .cover-wrapper .cover-body .logo {
    max-height: 150px;
  }
}
.cover-wrapper .cover-body .m_search {
  position: relative;
  max-width: calc(100% - 16px);
  width: 320px;
  vertical-align: middle;
}
.cover-wrapper .cover-body .m_search .form {
  position: relative;
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
  width: 100%;
}
.cover-wrapper .cover-body .m_search .icon,
.cover-wrapper .cover-body .m_search .input {
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
}
.cover-wrapper .cover-body .m_search .icon {
  position: absolute;
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
  line-height: 2.5rem;
  width: 32px;
  top: 0;
  left: 5px;
  color: rgba(68,68,68,0.75);
}
.cover-wrapper .cover-body .m_search .input {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
  height: 2.5rem;
  width: 100%;
  box-shadow: none;
  -webkit-box-shadow: none;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  font-size: 0.875rem;
  -webkit-appearance: none;
  padding-left: 36px;
  border-radius: 1.4rem;
  -webkit-border-radius: 1.4rem;
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(10px);
  border: none;
  color: var(--color-text);
}
@media screen and (max-width: 500px) {
  .cover-wrapper .cover-body .m_search .input {
    padding-left: 36px;
  }
}
.cover-wrapper .cover-body .m_search .input:hover {
  background: rgba(255,255,255,0.8);
}
.cover-wrapper .cover-body .m_search .input:focus {
  background: #fff;
}
.cover-wrapper .list-h {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  -webkit-box-direction: normal;
  -moz-box-direction: normal;
  -webkit-box-orient: horizontal;
  -moz-box-orient: horizontal;
  -webkit-flex-direction: row;
  -ms-flex-direction: row;
  flex-direction: row;
  flex-wrap: wrap;
  -webkit-flex-wrap: wrap;
  -khtml-flex-wrap: wrap;
  -moz-flex-wrap: wrap;
  -o-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  align-items: stretch;
  border-radius: 4px;
  -webkit-border-radius: 4px;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}
.cover-wrapper .list-h a {
  -webkit-box-flex: 1;
  -moz-box-flex: 1;
  -webkit-flex: 1 0;
  -ms-flex: 1 0;
  flex: 1 0;
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  font-weight: 600;
}
.cover-wrapper .list-h a img {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
  border-radius: 2px;
  -webkit-border-radius: 2px;
  margin: 4px;
  min-width: 40px;
  max-width: 44px;
}
@media screen and (max-width: 768px) {
  .cover-wrapper .list-h a img {
    min-width: 36px;
    max-width: 40px;
  }
}
@media screen and (max-width: 500px) {
  .cover-wrapper .list-h a img {
    margin: 2px 4px;
    min-width: 32px;
    max-width: 36px;
  }
}
@media screen and (max-width: 375px) {
  .cover-wrapper .list-h a img {
    min-width: 28px;
    max-width: 32px;
  }
}
.cover-wrapper {
  max-width: 100%;
}
.cover-wrapper.search .bottom .menu {
  margin-top: 16px;
}
.cover-wrapper.search .bottom .menu .list-h a {
  white-space: nowrap;
  -webkit-box-direction: normal;
  -moz-box-direction: normal;
  -webkit-box-orient: horizontal;
  -moz-box-orient: horizontal;
  -webkit-flex-direction: row;
  -ms-flex-direction: row;
  flex-direction: row;
  align-items: baseline;
  padding: 2px;
  margin: 4px;
  color: var(--color-site-inner);
  opacity: 0.75;
  -webkit-opacity: 0.75;
  -moz-opacity: 0.75;
  text-shadow: 0 1px 2px rgba(0,0,0,0.05);
  border-bottom: 2px solid transparent;
}
.cover-wrapper.search .bottom .menu .list-h a i {
  margin-right: 4px;
}
.cover-wrapper.search .bottom .menu .list-h a p {
  font-size: 0.9375rem;
}
.cover-wrapper.search .bottom .menu .list-h a:hover,
.cover-wrapper.search .bottom .menu .list-h a.active,
.cover-wrapper.search .bottom .menu .list-h a:active {
  opacity: 1;
  -webkit-opacity: 1;
  -moz-opacity: 1;
  border-bottom: 2px solid var(--color-site-inner);
}
.cover-wrapper.dock .menu,
.cover-wrapper.featured .menu,
.cover-wrapper.focus .menu {
  border-radius: 6px;
  -webkit-border-radius: 6px;
}
.cover-wrapper.dock .menu .list-h a,
.cover-wrapper.featured .menu .list-h a,
.cover-wrapper.focus .menu .list-h a {
  -webkit-box-direction: normal;
  -moz-box-direction: normal;
  -webkit-box-orient: vertical;
  -moz-box-orient: vertical;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  align-items: center;
  padding: 12px;
  line-height: 24px;
  border-radius: 4px;
  -webkit-border-radius: 4px;
  border-bottom: none;
  text-align: center;
  align-content: flex-end;
  color: rgba(68,68,68,0.7);
  font-size: 1.5rem;
}
@media screen and (max-width: 500px) {
  .cover-wrapper.dock .menu .list-h a,
  .cover-wrapper.featured .menu .list-h a,
  .cover-wrapper.focus .menu .list-h a {
    padding: 12px 8px;
  }
}
.cover-wrapper.dock .menu .list-h a i,
.cover-wrapper.featured .menu .list-h a i,
.cover-wrapper.focus .menu .list-h a i {
  margin: 8px;
}
.cover-wrapper.dock .menu .list-h a p,
.cover-wrapper.featured .menu .list-h a p,
.cover-wrapper.focus .menu .list-h a p {
  font-size: 0.875rem;
}
.cover-wrapper.dock .menu .list-h a.active,
.cover-wrapper.featured .menu .list-h a.active,
.cover-wrapper.focus .menu .list-h a.active {
  background: var(--color-card);
  backdrop-filter: none;
}
.cover-wrapper.dock .menu .list-h a.active i,
.cover-wrapper.featured .menu .list-h a.active i,
.cover-wrapper.focus .menu .list-h a.active i,
.cover-wrapper.dock .menu .list-h a.active i+p,
.cover-wrapper.featured .menu .list-h a.active i+p,
.cover-wrapper.focus .menu .list-h a.active i+p {
  color: #3dd9b6;
}
.cover-wrapper.dock .menu .list-h a.active img+p,
.cover-wrapper.featured .menu .list-h a.active img+p,
.cover-wrapper.focus .menu .list-h a.active img+p {
  color: var(--color-text);
}
.cover-wrapper.dock .menu .list-h a:hover,
.cover-wrapper.featured .menu .list-h a:hover,
.cover-wrapper.focus .menu .list-h a:hover {
  background: var(--color-card);
}
.cover-wrapper.dock .top {
  margin-bottom: 48px;
}
.cover-wrapper.dock .menu {
  background: rgba(255,255,255,0.5);
  position: absolute;
  bottom: 0;
  max-width: 100%;
}
.cover-wrapper.dock .menu .list-h {
  flex-wrap: nowrap;
  -webkit-flex-wrap: nowrap;
  -khtml-flex-wrap: nowrap;
  -moz-flex-wrap: nowrap;
  -o-flex-wrap: nowrap;
  -ms-flex-wrap: nowrap;
  margin: 4px;
}
.cover-wrapper.dock .menu .list-h a+a {
  margin-left: 4px;
}
@media screen and (max-width: 500px) {
  .cover-wrapper.dock .menu .list-h {
    overflow-x: scroll;
  }
  .cover-wrapper.dock .menu .list-h::-webkit-scrollbar {
    height: 0;
    width: 0;
  }
  .cover-wrapper.dock .menu .list-h::-webkit-scrollbar-track-piece {
    background: transparent;
  }
  .cover-wrapper.dock .menu .list-h::-webkit-scrollbar-thumb {
    background: #3dd9b6;
    cursor: pointer;
    border-radius: 0;
    -webkit-border-radius: 0;
  }
  .cover-wrapper.dock .menu .list-h::-webkit-scrollbar-thumb:hover {
    background: #ff5722;
  }
}
@supports (backdrop-filter: blur(20px)) {
  .cover-wrapper.dock .menu {
    background: rgba(255,255,255,0.5);
    backdrop-filter: saturate(200%) blur(20px);
  }
}
@font-face {
  font-family: 'UbuntuMono';
  src: url("https://unpkg.com/volantis-static@0.0.1654736714924/media/fonts/UbuntuMono/UbuntuMono-Regular.ttf");
  font-weight: 'normal';
  font-style: 'normal';
  font-display: swap;
}
@font-face {
  font-family: 'Varela Round';
  src: url("https://unpkg.com/volantis-static@0.0.1654736714924/media/fonts/VarelaRound/VarelaRound-Regular.ttf");
  font-weight: 'normal';
  font-style: 'normal';
  font-display: swap;
}
.l_header {
  position: fixed;
  z-index: 1000;
  top: 0;
  width: 100%;
  height: 64px;
  background: var(--color-card);
  box-shadow: 0 1px 2px 0px rgba(0,0,0,0.1);
  -webkit-box-shadow: 0 1px 2px 0px rgba(0,0,0,0.1);
}
.l_header.auto {
  transition: opacity 0.4s ease;
  -webkit-transition: opacity 0.4s ease;
  -khtml-transition: opacity 0.4s ease;
  -moz-transition: opacity 0.4s ease;
  -o-transition: opacity 0.4s ease;
  -ms-transition: opacity 0.4s ease;
  visibility: hidden;
}
.l_header.auto.show {
  opacity: 1 !important;
  -webkit-opacity: 1 !important;
  -moz-opacity: 1 !important;
  visibility: visible;
}
.l_header .container {
  margin-left: 16px;
  margin-right: 16px;
}
.l_header #wrapper {
  height: 100%;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}
.l_header #wrapper .nav-main,
.l_header #wrapper .nav-sub {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  flex-wrap: nowrap;
  -webkit-flex-wrap: nowrap;
  -khtml-flex-wrap: nowrap;
  -moz-flex-wrap: nowrap;
  -o-flex-wrap: nowrap;
  -ms-flex-wrap: nowrap;
  justify-content: space-between;
  -webkit-justify-content: space-between;
  -khtml-justify-content: space-between;
  -moz-justify-content: space-between;
  -o-justify-content: space-between;
  -ms-justify-content: space-between;
  align-items: center;
}
.l_header #wrapper .nav-main {
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
}
.l_header #wrapper.sub .nav-main {
  transform: translateY(-64px);
  -webkit-transform: translateY(-64px);
  -khtml-transform: translateY(-64px);
  -moz-transform: translateY(-64px);
  -o-transform: translateY(-64px);
  -ms-transform: translateY(-64px);
}
.l_header #wrapper .nav-sub {
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
  opacity: 0;
  -webkit-opacity: 0;
  -moz-opacity: 0;
  height: 64px;
  width: calc(100% - 2 * 16px);
  position: absolute;
}
.l_header #wrapper .nav-sub ::-webkit-scrollbar {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: none;
}
@media screen and (min-width: 2048px) {
  .l_header #wrapper .nav-sub {
    max-width: 55vw;
    margin: auto;
  }
}
.l_header #wrapper.sub .nav-sub {
  opacity: 1;
  -webkit-opacity: 1;
  -moz-opacity: 1;
}
.l_header #wrapper .title {
  position: relative;
  color: var(--color-text);
  padding-left: 24px;
  max-height: 64px;
}
.l_header #wrapper .nav-main .title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 0;
  line-height: 64px;
  padding: 0 24px;
  font-size: 1.25rem;
  font-family: "Varela Round", "PingFang SC", "Microsoft YaHei", Helvetica, Arial, Helvetica, monospace;
}
.l_header #wrapper .nav-main .title img {
  height: 64px;
}
.l_header .nav-sub {
  max-width: 1080px;
  margin: auto;
}
.l_header .nav-sub .title {
  font-weight: bold;
  font-family: UbuntuMono, "Varela Round", "PingFang SC", "Microsoft YaHei", Helvetica, Arial, Menlo, Monaco, monospace, sans-serif;
  line-height: 1.2;
  max-height: 64px;
  white-space: normal;
  flex-shrink: 1;
}
.l_header .switcher {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: none;
  line-height: 64px;
  align-items: center;
}
.l_header .switcher .s-toc {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: none;
}
@media screen and (max-width: 768px) {
  .l_header .switcher .s-toc {
    display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
    display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
    display: -ms-flexbox /* TWEENER - IE 10 */;
    display: -webkit-flex /* NEW - Chrome */;
    display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
    display: flex;
  }
}
.l_header .switcher >li {
  height: 48px;
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
  margin: 2px;
}
@media screen and (max-width: 500px) {
  .l_header .switcher >li {
    margin: 0 1px;
    height: 48px;
  }
}
.l_header .switcher >li >a {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  justify-content: center;
  -webkit-justify-content: center;
  -khtml-justify-content: center;
  -moz-justify-content: center;
  -o-justify-content: center;
  -ms-justify-content: center;
  align-items: center;
  width: 48px;
  height: 48px;
  padding: 0.85em 1.1em;
  border-radius: 100px;
  -webkit-border-radius: 100px;
  border: none;
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
  color: #3dd9b6;
}
.l_header .switcher >li >a:hover {
  border: none;
}
.l_header .switcher >li >a.active,
.l_header .switcher >li >a:active {
  border: none;
  background: var(--color-site-bg);
}
@media screen and (max-width: 500px) {
  .l_header .switcher >li >a {
    width: 36px;
    height: 48px;
  }
}
.l_header .nav-sub .switcher {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
}
.l_header .m_search {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  height: 64px;
  width: 240px;
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
}
@media screen and (max-width: 1024px) {
  .l_header .m_search {
    width: 44px;
    min-width: 44px;
  }
  .l_header .m_search input::placeholder {
    opacity: 0;
    -webkit-opacity: 0;
    -moz-opacity: 0;
  }
  .l_header .m_search:hover {
    width: 240px;
  }
  .l_header .m_search:hover input::placeholder {
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
@media screen and (min-width: 500px) {
  .l_header .m_search:hover .input {
    width: 100%;
  }
  .l_header .m_search:hover .input::placeholder {
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
@media screen and (max-width: 500px) {
  .l_header .m_search {
    min-width: 0;
  }
  .l_header .m_search input::placeholder {
    opacity: 1;
    -webkit-opacity: 1;
    -moz-opacity: 1;
  }
}
.l_header .m_search .form {
  position: relative;
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  width: 100%;
  align-items: center;
}
.l_header .m_search .icon {
  position: absolute;
  width: 36px;
  left: 5px;
  color: var(--color-meta);
}
@media screen and (max-width: 500px) {
  .l_header .m_search .icon {
    display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
    display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
    display: none;
  }
}
.l_header .m_search .input {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
  padding-top: 8px;
  padding-bottom: 8px;
  line-height: 1.3;
  width: 100%;
  color: var(--color-text);
  background: #fafafa;
  box-shadow: none;
  -webkit-box-shadow: none;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  padding-left: 40px;
  font-size: 0.875rem;
  border-radius: 8px;
  -webkit-border-radius: 8px;
  border: none;
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
}
@media screen and (min-width: 500px) {
  .l_header .m_search .input:focus {
    box-shadow: 0 4px 8px 0px rgba(0,0,0,0.1);
    -webkit-box-shadow: 0 4px 8px 0px rgba(0,0,0,0.1);
  }
}
@media screen and (max-width: 500px) {
  .l_header .m_search .input {
    background: var(--color-block);
    padding-left: 8px;
    border: none;
  }
  .l_header .m_search .input:hover,
  .l_header .m_search .input:focus {
    border: none;
  }
}
@media (max-width: 500px) {
  .l_header .m_search {
    left: 0;
    width: 0;
    overflow: hidden;
    position: absolute;
    background: #fff;
    transition: all 0.28s ease;
    -webkit-transition: all 0.28s ease;
    -khtml-transition: all 0.28s ease;
    -moz-transition: all 0.28s ease;
    -o-transition: all 0.28s ease;
    -ms-transition: all 0.28s ease;
  }
  .l_header .m_search .input {
    border-radius: 32px;
    -webkit-border-radius: 32px;
    margin-left: 16px;
    padding-left: 16px;
  }
  .l_header.z_search-open .m_search {
    width: 100%;
  }
  .l_header.z_search-open .m_search .input {
    width: calc(100% - 120px);
  }
}
ul.m-pc >li>a {
  color: inherit;
  border-bottom: 2px solid transparent;
}
ul.m-pc >li>a:active,
ul.m-pc >li>a.active {
  border-bottom: 2px solid #3dd9b6;
}
ul.m-pc li:hover >ul.list-v,
ul.list-v li:hover >ul.list-v {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
}
ul.nav-list-h {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: -ms-flexbox /* TWEENER - IE 10 */;
  display: -webkit-flex /* NEW - Chrome */;
  display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
  display: flex;
  align-items: stretch;
}
ul.nav-list-h>li {
  position: relative;
  justify-content: center;
  -webkit-justify-content: center;
  -khtml-justify-content: center;
  -moz-justify-content: center;
  -o-justify-content: center;
  -ms-justify-content: center;
  height: 100%;
  line-height: 2.4;
  border-radius: 4px;
  -webkit-border-radius: 4px;
}
ul.nav-list-h>li >a {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-weight: 600;
}
ul.list-v {
  z-index: 1;
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: none;
  position: absolute;
  background: var(--color-card);
  box-shadow: 0 2px 4px 0px rgba(0,0,0,0.08), 0 4px 8px 0px rgba(0,0,0,0.08), 0 8px 16px 0px rgba(0,0,0,0.08);
  -webkit-box-shadow: 0 2px 4px 0px rgba(0,0,0,0.08), 0 4px 8px 0px rgba(0,0,0,0.08), 0 8px 16px 0px rgba(0,0,0,0.08);
  margin-top: -6px;
  border-radius: 4px;
  -webkit-border-radius: 4px;
  padding: 8px 0;
}
ul.list-v.show {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
}
ul.list-v hr {
  margin-top: 8px;
  margin-bottom: 8px;
}
ul.list-v >li {
  white-space: nowrap;
  word-break: keep-all;
}
ul.list-v >li.header {
  font-size: 0.78125rem;
  font-weight: bold;
  line-height: 2em;
  color: var(--color-meta);
  margin: 8px 16px 4px;
}
ul.list-v >li.header i {
  margin-right: 8px;
}
ul.list-v >li ul {
  margin-left: 0;
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: none;
  margin-top: -40px;
}
ul.list-v .aplayer-container {
  min-height: 64px;
  padding: 6px 16px;
}
ul.list-v >li>a {
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
  color: var(--color-list);
  font-size: 0.875rem;
  font-weight: bold;
  line-height: 36px;
  padding: 0 20px 0 16px;
  text-overflow: ellipsis;
  margin: 0 4px;
  border-radius: 4px;
  -webkit-border-radius: 4px;
}
@media screen and (max-width: 1024px) {
  ul.list-v >li>a {
    line-height: 40px;
  }
}
ul.list-v >li>a >i {
  margin-right: 8px;
}
ul.list-v >li>a:active,
ul.list-v >li>a.active {
  color: var(--color-list-hl);
}
ul.list-v >li>a:hover {
  color: var(--color-list-hl);
  background: var(--color-site-bg);
}
.l_header .menu >ul>li>a {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: block;
  padding: 0 8px;
}
.l_header .menu >ul>li>a >i {
  margin-right: 4px;
}
.l_header ul.nav-list-h>li {
  color: var(--color-list);
  line-height: 64px;
}
.l_header ul.nav-list-h>li >a {
  max-height: 64px;
  overflow: hidden;
  color: inherit;
}
.l_header ul.nav-list-h>li >a:active,
.l_header ul.nav-list-h>li >a.active {
  color: #3dd9b6;
}
.l_header ul.nav-list-h>li:hover>a {
  color: var(--color-list-hl);
}
.l_header ul.nav-list-h>li i.music {
  animation: rotate-effect 1.5s linear infinite;
  -webkit-animation: rotate-effect 1.5s linear infinite;
  -khtml-animation: rotate-effect 1.5s linear infinite;
  -moz-animation: rotate-effect 1.5s linear infinite;
  -o-animation: rotate-effect 1.5s linear infinite;
  -ms-animation: rotate-effect 1.5s linear infinite;
}
@-moz-keyframes rotate-effect {
  0% {
    transform: rotate(0);
    -webkit-transform: rotate(0);
    -khtml-transform: rotate(0);
    -moz-transform: rotate(0);
    -o-transform: rotate(0);
    -ms-transform: rotate(0);
  }
  25% {
    transform: rotate(90deg);
    -webkit-transform: rotate(90deg);
    -khtml-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
    -o-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
  }
  50% {
    transform: rotate(180deg);
    -webkit-transform: rotate(180deg);
    -khtml-transform: rotate(180deg);
    -moz-transform: rotate(180deg);
    -o-transform: rotate(180deg);
    -ms-transform: rotate(180deg);
  }
  75% {
    transform: rotate(270deg);
    -webkit-transform: rotate(270deg);
    -khtml-transform: rotate(270deg);
    -moz-transform: rotate(270deg);
    -o-transform: rotate(270deg);
    -ms-transform: rotate(270deg);
  }
  100% {
    transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -khtml-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
  }
}
@-webkit-keyframes rotate-effect {
  0% {
    transform: rotate(0);
    -webkit-transform: rotate(0);
    -khtml-transform: rotate(0);
    -moz-transform: rotate(0);
    -o-transform: rotate(0);
    -ms-transform: rotate(0);
  }
  25% {
    transform: rotate(90deg);
    -webkit-transform: rotate(90deg);
    -khtml-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
    -o-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
  }
  50% {
    transform: rotate(180deg);
    -webkit-transform: rotate(180deg);
    -khtml-transform: rotate(180deg);
    -moz-transform: rotate(180deg);
    -o-transform: rotate(180deg);
    -ms-transform: rotate(180deg);
  }
  75% {
    transform: rotate(270deg);
    -webkit-transform: rotate(270deg);
    -khtml-transform: rotate(270deg);
    -moz-transform: rotate(270deg);
    -o-transform: rotate(270deg);
    -ms-transform: rotate(270deg);
  }
  100% {
    transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -khtml-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
  }
}
@-o-keyframes rotate-effect {
  0% {
    transform: rotate(0);
    -webkit-transform: rotate(0);
    -khtml-transform: rotate(0);
    -moz-transform: rotate(0);
    -o-transform: rotate(0);
    -ms-transform: rotate(0);
  }
  25% {
    transform: rotate(90deg);
    -webkit-transform: rotate(90deg);
    -khtml-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
    -o-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
  }
  50% {
    transform: rotate(180deg);
    -webkit-transform: rotate(180deg);
    -khtml-transform: rotate(180deg);
    -moz-transform: rotate(180deg);
    -o-transform: rotate(180deg);
    -ms-transform: rotate(180deg);
  }
  75% {
    transform: rotate(270deg);
    -webkit-transform: rotate(270deg);
    -khtml-transform: rotate(270deg);
    -moz-transform: rotate(270deg);
    -o-transform: rotate(270deg);
    -ms-transform: rotate(270deg);
  }
  100% {
    transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -khtml-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
  }
}
@keyframes rotate-effect {
  0% {
    transform: rotate(0);
    -webkit-transform: rotate(0);
    -khtml-transform: rotate(0);
    -moz-transform: rotate(0);
    -o-transform: rotate(0);
    -ms-transform: rotate(0);
  }
  25% {
    transform: rotate(90deg);
    -webkit-transform: rotate(90deg);
    -khtml-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
    -o-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
  }
  50% {
    transform: rotate(180deg);
    -webkit-transform: rotate(180deg);
    -khtml-transform: rotate(180deg);
    -moz-transform: rotate(180deg);
    -o-transform: rotate(180deg);
    -ms-transform: rotate(180deg);
  }
  75% {
    transform: rotate(270deg);
    -webkit-transform: rotate(270deg);
    -khtml-transform: rotate(270deg);
    -moz-transform: rotate(270deg);
    -o-transform: rotate(270deg);
    -ms-transform: rotate(270deg);
  }
  100% {
    transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -khtml-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
  }
}
.menu-phone li ul.list-v {
  right: calc(100% - 0.5 * 16px);
}
.menu-phone li ul.list-v ul {
  right: calc(100% - 0.5 * 16px);
}
#wrapper {
  max-width: 1080px;
  margin: auto;
}
@media screen and (min-width: 2048px) {
  #wrapper {
    max-width: 55vw;
  }
}
#wrapper .menu {
  -webkit-box-flex: 1;
  -moz-box-flex: 1;
  -webkit-flex: 1 1;
  -ms-flex: 1 1;
  flex: 1 1;
  margin: 0 16px 0 0;
}
#wrapper .menu .list-v ul {
  left: calc(100% - 0.5 * 16px);
}
.menu-phone {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: none;
  margin-top: 16px;
  right: 8px;
  transition: all 0.28s ease;
  -webkit-transition: all 0.28s ease;
  -khtml-transition: all 0.28s ease;
  -moz-transition: all 0.28s ease;
  -o-transition: all 0.28s ease;
  -ms-transition: all 0.28s ease;
}
.menu-phone ul {
  right: calc(100% - 0.5 * 16px);
}
@media screen and (max-width: 500px) {
  .menu-phone {
    display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
    display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
    display: block;
  }
}
.l_header {
  max-width: 65vw;
  left: calc((100% - 65vw) * 0.5);
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
}
@media screen and (max-width: 2048px) {
  .l_header {
    max-width: 1112px;
    left: calc((100% - 1112px) * 0.5);
  }
}
@media screen and (max-width: 1112px) {
  .l_header {
    left: 0;
    border-radius: 0;
    -webkit-border-radius: 0;
    max-width: 100%;
  }
}
@media screen and (max-width: 500px) {
  .l_header .container {
    margin-left: 0;
    margin-right: 0;
  }
  .l_header #wrapper .nav-main .title {
    padding-left: 16px;
    padding-right: 16px;
  }
  .l_header #wrapper .nav-sub {
    width: 100%;
  }
  .l_header #wrapper .nav-sub .title {
    overflow-y: scroll;
    margin-top: 2px;
    padding: 8px 16px;
  }
  .l_header #wrapper .switcher {
    display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
    display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
    display: -ms-flexbox /* TWEENER - IE 10 */;
    display: -webkit-flex /* NEW - Chrome */;
    display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;
    display: flex;
    margin-right: 8px;
  }
  .l_header .menu {
    display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
    display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
    display: none;
  }
}
@media screen and (max-width: 500px) {
  .list-v li {
    max-width: 270px;
  }
}
#u-search {
  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;
  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 60px 20px;
  z-index: 1001;
}
@media screen and (max-width: 680px) {
  #u-search {
    padding: 0px;
  }
}

  </style>
  <link rel="stylesheet" href="/css/style.css" media="print" onload="this.media='all';this.onload=null">
  <noscript><link rel="stylesheet" href="/css/style.css"></noscript>
  
<script>
if (/*@cc_on!@*/false || (!!window.MSInputMethodContext && !!document.documentMode))
    document.write(
	'<style>'+
		'html{'+
			'overflow-x: hidden !important;'+
			'overflow-y: hidden !important;'+
		'}'+
		'.kill-ie{'+
			'text-align:center;'+
			'height: 100%;'+
			'margin-top: 15%;'+
			'margin-bottom: 5500%;'+
		'}'+
    '.kill-t{'+
      'font-size: 2rem;'+
    '}'+
    '.kill-c{'+
      'font-size: 1.2rem;'+
    '}'+
		'#l_header,#l_body{'+
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		'}'+
	'</style>'+
    '<div class="kill-ie">'+
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    '</div>');
</script>


<noscript>
	<style>
		html{
			overflow-x: hidden !important;
			overflow-y: hidden !important;
		}
		.kill-noscript{
			text-align:center;
			height: 100%;
			margin-top: 15%;
			margin-bottom: 5500%;
		}
    .kill-t{
      font-size: 2rem;
    }
    .kill-c{
      font-size: 1.2rem;
    }
		#l_header,#l_body{
			display: none;
		}
	</style>
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    </div>
</noscript>


  <script>
  /************这个文件存放不需要重载的全局变量和全局函数*********/
  window.volantis = {}; // volantis 全局变量
  volantis.debug = "env"; // 调试模式
  volantis.dom = {}; // 页面Dom see: /source/js/app.js etc.

  volantis.GLOBAL_CONFIG ={
    debug: "env",
    cdn: {"js":{"app":"/js/app.js","parallax":"/js/plugins/parallax.js","rightMenu":"/js/plugins/rightMenu.js","rightMenus":"/js/plugins/rightMenus.js","sites":"/js/plugins/tags/sites.js","friends":"/js/plugins/tags/friends.js","contributors":"/js/plugins/tags/contributors.js","search":"/js/search/hexo.js"},"css":{"style":"/css/style.css"}},
    default: {"avatar":"https://unpkg.com/volantis-static@0.0.1654736714924/media/placeholder/avatar/round/3442075.svg","link":"https://unpkg.com/volantis-static@0.0.1654736714924/media/placeholder/link/8f277b4ee0ecd.svg","cover":"https://unpkg.com/volantis-static@0.0.1654736714924/media/placeholder/cover/76b86c0226ffd.svg","image":"https://unpkg.com/volantis-static@0.0.1654736714924/media/placeholder/image/2659360.svg"},
    lastupdate: new Date(1739433735785),
    sidebar: {
      for_page: ["blogger","category","tagcloud","donate"],
      for_post: ["toc"],
      webinfo: {
        lastupd: {
          enable: true,
          friendlyShow: true
        },
        runtime: {
          data: "2020/01/01",
          unit: "天"
        }
      }
    },
    plugins: {
      message: {"enable":true,"css":"https://unpkg.com/volantis-static@0.0.1654736714924/libs/izitoast/dist/css/iziToast.min.css","js":"https://unpkg.com/volantis-static@0.0.1654736714924/libs/izitoast/dist/js/iziToast.min.js","icon":{"default":"fa-solid fa-info-circle light-blue","quection":"fa-solid fa-question-circle light-blue"},"time":{"default":5000,"quection":20000},"position":"topRight","transitionIn":"bounceInLeft","transitionOut":"fadeOutRight","titleColor":"var(--color-text)","messageColor":"var(--color-text)","backgroundColor":"var(--color-card)","zindex":2147483647,"copyright":{"enable":true,"title":"知识共享许可协议","message":"请遵守 CC BY-NC-SA 4.0 协议。","icon":"far fa-copyright light-blue"},"aplayer":{"enable":true,"play":"fa-solid fa-play","pause":"fa-solid fa-pause"},"rightmenu":{"enable":true,"notice":true}},
      fancybox: {"css":"https://unpkg.com/volantis-static@0.0.1654736714924/libs/@fancyapps/ui/dist/fancybox.css","js":"https://unpkg.com/volantis-static@0.0.1654736714924/libs/@fancyapps/ui/dist/fancybox.umd.js"},
      
      
      
    }
  }

  /******************** volantis.EventListener ********************************/
  // 事件监听器 see: /source/js/app.js
  volantis.EventListener = {}
  // 这里存放pjax切换页面时将被移除的事件监听器
  volantis.EventListener.list = []
  //构造方法
  function volantisEventListener(type, f, ele) {
    this.type = type
    this.f = f
    this.ele = ele
  }
  // 移除事件监听器
  volantis.EventListener.remove = () => {
    volantis.EventListener.list.forEach(function (i) {
      i.ele.removeEventListener(i.type, i.f, false)
    })
    volantis.EventListener.list = []
  }
  /******************** volantis.dom.$ ********************************/
  // 注：这里没有选择器，也没有forEach一次只处理一个dom，这里重新封装主题常用的dom方法，返回的是dom对象，对象包含了以下方法，同时保留dom的原生API
  function volantisDom(ele) {
    if (!ele) ele = document.createElement("div")
    this.ele = ele;
    // ==============================================================
    this.ele.find = (c) => {
      let q = this.ele.querySelector(c)
      if (q)
        return new volantisDom(q)
    }
    // ==============================================================
    this.ele.hasClass = (c) => {
      return this.ele.className.match(new RegExp('(\\s|^)' + c + '(\\s|$)'));
    }
    this.ele.addClass = (c) => {
      this.ele.classList.add(c);
      return this.ele
    }
    this.ele.removeClass = (c) => {
      this.ele.classList.remove(c);
      return this.ele
    }
    this.ele.toggleClass = (c) => {
      if (this.ele.hasClass(c)) {
        this.ele.removeClass(c)
      } else {
        this.ele.addClass(c)
      }
      return this.ele
    }
    // ==============================================================
    // 参数 r 为 true 表示pjax切换页面时事件监听器将被移除，false不移除
    this.ele.on = (c, f, r = 1) => {
      this.ele.addEventListener(c, f, false)
      if (r) {
        volantis.EventListener.list.push(new volantisEventListener(c, f, this.ele))
      }
      return this.ele
    }
    this.ele.click = (f, r) => {
      this.ele.on("click", f, r)
      return this.ele
    }
    this.ele.scroll = (f, r) => {
      this.ele.on("scroll", f, r)
      return this.ele
    }
    // ==============================================================
    this.ele.html = (c) => {
      // if(c=== undefined){
      //   return this.ele.innerHTML
      // }else{
      this.ele.innerHTML = c
      return this.ele
      // }
    }
    // ==============================================================
    this.ele.hide = (c) => {
      this.ele.style.display = "none"
      return this.ele
    }
    this.ele.show = (c) => {
      this.ele.style.display = "block"
      return this.ele
    }
    // ==============================================================
    return this.ele
  }
  volantis.dom.$ = (ele) => {
    return !!ele ? new volantisDom(ele) : null;
  }
  /******************** RunItem ********************************/
  function RunItem() {
    this.list = []; // 存放回调函数
    this.start = () => {
      for (var i = 0; i < this.list.length; i++) {
        this.list[i].run();
      }
    };
    this.push = (fn, name, setRequestAnimationFrame = true) => {
      let myfn = fn
      if (setRequestAnimationFrame) {
        myfn = ()=>{
          volantis.requestAnimationFrame(fn)
        }
      }
      var f = new Item(myfn, name);
      this.list.push(f);
    };
    this.remove = (name) =>{
      for (let index = 0; index < this.list.length; index++) {
        const e = this.list[index];
        if (e.name == name) {
          this.list.splice(index,1);
        }
      }
    }
    // 构造一个可以run的对象
    function Item(fn, name) {
      // 函数名称
      this.name = name || fn.name;
      // run方法
      this.run = () => {
        try {
          fn()
        } catch (error) {
          console.log(error);
        }
      };
    }
  }
  /******************** Pjax ********************************/
  // /layout/_plugins/pjax/index.ejs
  // volantis.pjax.send(callBack[,"callBackName"]) 传入pjax:send回调函数
  // volantis.pjax.push(callBack[,"callBackName"]) 传入pjax:complete回调函数
  // volantis.pjax.error(callBack[,"callBackName"]) 传入pjax:error回调函数
  volantis.pjax = {};
  volantis.pjax.method = {
    complete: new RunItem(),
    error: new RunItem(),
    send: new RunItem(),
  };
  volantis.pjax = Object.assign(volantis.pjax, {
    push: volantis.pjax.method.complete.push,
    error: volantis.pjax.method.error.push,
    send: volantis.pjax.method.send.push,
  });
  /******************** RightMenu ********************************/
  // volantis.rightmenu.handle(callBack[,"callBackName"]) 外部菜单项控制
  // 可在 volantis.mouseEvent 处获取右键事件
  volantis.rightmenu = {};
  volantis.rightmenu.method = {
    handle: new RunItem(),
  }
  volantis.rightmenu = Object.assign(volantis.rightmenu, {
    handle: volantis.rightmenu.method.handle.push,
  });
  /********************  Dark Mode  ********************************/
  // /layout/_partial/scripts/darkmode.ejs
  // volantis.dark.mode 当前模式 dark or light
  // volantis.dark.toggle() 暗黑模式触发器
  // volantis.dark.push(callBack[,"callBackName"]) 传入触发器回调函数
  volantis.dark = {};
  volantis.dark.method = {
    toggle: new RunItem(),
  };
  volantis.dark = Object.assign(volantis.dark, {
    push: volantis.dark.method.toggle.push,
  });
  /********************  Message  ********************************/
  // VolantisApp.message
  /********************  isMobile  ********************************/
  // /source/js/app.js
  // volantis.isMobile
  // volantis.isMobileOld
  /********************脚本动态加载函数********************************/
  // volantis.js(src, cb)  cb 可以传入onload回调函数 或者 JSON对象 例如: volantis.js("src", ()=>{}) 或 volantis.js("src", {defer:true,onload:()=>{}})
  // volantis.css(src)

  // 返回Promise对象，如下方法同步加载资源，这利于处理文件资源之间的依赖关系，例如：APlayer 需要在 MetingJS 之前加载
  // (async () => {
  //     await volantis.js("...theme.plugins.aplayer.js.aplayer...")
  //     await volantis.js("...theme.plugins.aplayer.js.meting...")
  // })();

  // 已经加入了setTimeout
  volantis.js = (src, cb) => {
    return new Promise(resolve => {
      setTimeout(function () {
        var HEAD = document.getElementsByTagName("head")[0] || document.documentElement;
        var script = document.createElement("script");
        script.setAttribute("type", "text/javascript");
        if (cb) {
          if (JSON.stringify(cb)) {
            for (let p in cb) {
              if (p == "onload") {
                script[p] = () => {
                  cb[p]()
                  resolve()
                }
              } else {
                script[p] = cb[p]
                script.onload = resolve
              }
            }
          } else {
            script.onload = () => {
              cb()
              resolve()
            };
          }
        } else {
          script.onload = resolve
        }
        script.setAttribute("src", src);
        HEAD.appendChild(script);
      });
    });
  }
  volantis.css = (src) => {
    return new Promise(resolve => {
      setTimeout(function () {
        var link = document.createElement('link');
        link.rel = "stylesheet";
        link.href = src;
        link.onload = resolve;
        document.getElementsByTagName("head")[0].appendChild(link);
      });
    });
  }
  /********************按需加载的插件********************************/
  // volantis.import.jQuery().then(()=>{})
  volantis.import = {
    jQuery: () => {
      if (typeof jQuery == "undefined") {
        return volantis.js("https://unpkg.com/volantis-static@0.0.1654736714924/libs/jquery/dist/jquery.min.js")
      } else {
        return new Promise(resolve => {
          resolve()
        });
      }
    }
  }
  /********************** requestAnimationFrame ********************************/
  // 1、requestAnimationFrame 会把每一帧中的所有 DOM 操作集中起来，在一次重绘或回流中就完成，并且重绘或回流的时间间隔紧紧跟随浏览器的刷新频率，一般来说，这个频率为每秒60帧。
  // 2、在隐藏或不可见的元素中，requestAnimationFrame 将不会进行重绘或回流，这当然就意味着更少的的 cpu，gpu 和内存使用量。
  volantis.requestAnimationFrame = (fn)=>{
    if (!window.requestAnimationFrame) {
      window.requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame;
    }
    window.requestAnimationFrame(fn)
  }
  /************************ layoutHelper *****************************************/
  volantis.layoutHelper = (helper, html, opt)=>{
    opt = Object.assign({clean:false, pjax:true}, opt)
    function myhelper(helper, html, clean) {
      volantis.tempDiv = document.createElement("div");
      volantis.tempDiv.innerHTML = html;
      let layoutHelper = document.querySelector("#layoutHelper-"+helper)
      if (layoutHelper) {
        if (clean) {
          layoutHelper.innerHTML = ""
        }
        layoutHelper.append(volantis.tempDiv);
      }
    }
    myhelper(helper, html, opt.clean)
    if (opt.pjax) {
      volantis.pjax.push(()=>{
        myhelper(helper, html, opt.clean)
      },"layoutHelper-"+helper)
    }
  }
  /****************************** 滚动事件处理 ****************************************/
  volantis.scroll = {
    engine: new RunItem(),
    unengine: new RunItem(),
  };
  volantis.scroll = Object.assign(volantis.scroll, {
    push: volantis.scroll.engine.push,
  });
  // 滚动条距离顶部的距离
  volantis.scroll.getScrollTop = () =>{
    let scrollPos;
    if (window.pageYOffset) {
      scrollPos = window.pageYOffset;
    } else if (document.compatMode && document.compatMode != 'BackCompat') {
      scrollPos = document.documentElement.scrollTop;
    } else if (document.body) {
      scrollPos = document.body.scrollTop;
    }
    return scrollPos;
  }
  // 使用 requestAnimationFrame 处理滚动事件
  // `volantis.scroll.del` 中存储了一个数值, 该数值检测一定时间间隔内滚动条滚动的位移, 数值的检测频率是浏览器的刷新频率. 数值为正数时, 表示向下滚动. 数值为负数时, 表示向上滚动.
  volantis.scroll.handleScrollEvents = () => {
    volantis.scroll.lastScrollTop = volantis.scroll.getScrollTop()
    function loop() {
      const scrollTop = volantis.scroll.getScrollTop();
      if (volantis.scroll.lastScrollTop !== scrollTop) {
        volantis.scroll.del = scrollTop - volantis.scroll.lastScrollTop;
        volantis.scroll.lastScrollTop = scrollTop;
        // if (volantis.scroll.del > 0) {
        //   console.log("向下滚动");
        // } else {
        //   console.log("向上滚动");
        // }
        // 注销过期的unengine未滚动事件
        volantis.scroll.unengine.list=[]
        volantis.scroll.engine.start();
      }else{
        volantis.scroll.unengine.start();
      }
      volantis.requestAnimationFrame(loop)
    }
    volantis.requestAnimationFrame(loop)
  }
  volantis.scroll.handleScrollEvents()
  volantis.scroll.ele = null;
  // 触发页面滚动至目标元素位置
  volantis.scroll.to = (ele, option = {}) => {
    if (!ele) return;
    volantis.scroll.ele = ele;
    // 默认配置
    opt = {
      top: ele.getBoundingClientRect().top + document.documentElement.scrollTop,
      behavior: "smooth"
    }
    // 定义配置
    if ("top" in option) {
      opt.top = option.top
    }
    if ("behavior" in option) {
      opt.behavior = option.behavior
    }
    if ("addTop" in option) {
      opt.top += option.addTop
    }
    if (!("observerDic" in option)) {
      option.observerDic = 100
    }
    // 滚动
    window.scrollTo(opt);
    // 监视器
    // 监视并矫正元素滚动到指定位置
    // 用于处理 lazyload 引起的 cls 导致的定位失败问题
    // option.observer = false
    if (option.observer) {
      setTimeout(() => {
        if (volantis.scroll.ele != ele) {
          return
        }
        volantis.scroll.unengine.push(() => {
          let me = ele.getBoundingClientRect().top
          if(!(me >= -option.observerDic && me <= option.observerDic)){
            volantis.scroll.to(ele, option)
          }
          volantis.scroll.unengine.remove("unengineObserver")
        },"unengineObserver")
      },1000)
    }
  }
  /********************** Content Visibility ********************************/
  // 见 source/css/first.styl 如果遇到任何问题 删除 .post-story 即可
  // 一个元素被声明 content-visibility 属性后 如果元素不在 viewport 中 浏览器不会计算其后代元素样式和属性 从而节省 Style & Layout 耗时
  // content-visibility 的副作用: 锚点失效 等等(实验初期 暂不明确), 使用此方法清除样式
  volantis.cleanContentVisibility = ()=>{
    if (document.querySelector(".post-story")) {
      console.log("cleanContentVisibility");
      document.querySelectorAll(".post-story").forEach(e=>{
        e.classList.remove("post-story")
      })
    }
  }
  /******************************************************************************/
  /******************************************************************************/
  /******************************************************************************/
  //图像加载出错时的处理
  function errorImgAvatar(img) {
    img.src = "https://unpkg.com/volantis-static@0.0.1654736714924/media/placeholder/avatar/round/3442075.svg";
    img.onerror = null;
  }
  function errorImgCover(img) {
    img.src = "https://unpkg.com/volantis-static@0.0.1654736714924/media/placeholder/cover/76b86c0226ffd.svg";
    img.onerror = null;
  }
  /******************************************************************************/
</script>

  <!-- import head_end begin -->
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    <header itemscope itemtype="http://schema.org/WPHeader" id="l_header" class="l_header auto shadow floatable blur show" style='opacity: 0' >
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                href="/tags/" title="标签"
                  
                  
                  
                    active-action="action-tags"
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                  <i class='fa-solid fa-tags fa-fw'></i>标签
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                </a>
                
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              <li>
                <a class="menuitem flat-box faa-parent animated-hover"
                href="/friends/" title="友链"
                  
                  
                  
                    active-action="action-friends"
                  >
                  <i class='fa-solid fa-link fa-fw'></i>友链
                </a>
                
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              <li>
                <a class="menuitem flat-box faa-parent animated-hover"
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                    active-action="action-about"
                  >
                  <i class='fa-solid fa-info-circle fa-fw'></i>关于
                </a>
                
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				</ul>
			</div>
      
      <div class="m_search">
        <form name="searchform" class="form u-search-form">
          <i class="icon fa-solid fa-search fa-fw"></i>
          <input type="text" class="input u-search-input" placeholder="Search..." />
        </form>
      </div>
      

			<ul class='switcher nav-list-h m-phone'>
				
					<li><a class="s-search fa-solid fa-search fa-fw" target="_self" href="/" onclick="return false;" title="search"></a></li>
				
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                    active-action="action-home"
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                </a>
                
              </li>
            
          
            
              
            
              <li>
                <a class="menuitem flat-box faa-parent animated-hover"
                href="/categories/" title="分类"
                  
                  
                  
                    active-action="action-categories"
                  >
                  <i class='fa-solid fa-folder-open fa-fw'></i>分类
                </a>
                
              </li>
            
          
            
              
            
              <li>
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                href="/tags/" title="标签"
                  
                  
                  
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                  >
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                </a>
                
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                href="/friends/" title="友链"
                  
                  
                  
                    active-action="action-friends"
                  >
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                </a>
                
              </li>
            
          
            
              
            
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                href="/about/" title="关于"
                  
                  
                  
                    active-action="action-about"
                  >
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                </a>
                
              </li>
            
          
            
          </ul>
        </li>
			</ul>

      <!-- Custom Files header begin -->
      
      <!-- Custom Files header end -->
		</div>
	</div>
  </div>
</header>

    <div id="l_body">
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      <div id="none" class='cover-wrapper post dock' style="display: none;">
        
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              active-action="action-examples">
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            </a>
          
            <a href="/contributors/"
              
              
              active-action="action-contributors">
              <img src='https://unpkg.com/volantis-static@0.0.1654736714924/media/twemoji/assets/svg/1f389.svg'><p>社区</p>
            </a>
          
            <a href="/archives/"
              
              
              active-action="action-archives">
              <img src='https://unpkg.com/volantis-static@0.0.1654736714924/media/twemoji/assets/svg/1f4f0.svg'><p>博客</p>
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    <p itemprop="name">请设置文章作者</p>
  </a>
</div>

          
        
          
            

          
        
          
            <div class="new-meta-item date" itemprop="dateCreated datePublished" datetime="2023-12-20T11:29:46+08:00">
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    <p>发布于：Dec 20, 2023</p>
  </a>
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  <div id="layoutHelper-page-plugins"></div>
  <div id="post-body" itemprop="articleBody">
    <h2 id="伪元素"><a href="#伪元素" class="headerlink" title="伪元素"></a>伪元素</h2><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// first-of-type 选择每个p元素是其父级的第一个p元素</span></span><br><span class="line"><span class="comment">// last-of-type 选择每个p元素是其父级的最后一个p元素</span></span><br><span class="line"><span class="comment">// only-of-type 选择每个p元素是其父级的唯一p元素</span></span><br><span class="line"><span class="comment">// nth-of-type(n) 选择每个p元素是其父级的第n个p元素</span></span><br><span class="line"><span class="comment">// nth-last-of-type(n) 选择每个p元素的是其父级的第n个p元素，从最后一个子项计数</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// first-child 指定只有当&lt;p&gt;元素是其父级的第一个子级的样式。</span></span><br><span class="line"><span class="comment">// last-child 选择每个p元素是其父级的最后一个子级。</span></span><br><span class="line"><span class="comment">// only-child 选择每个p元素是其父级的唯一子元素</span></span><br><span class="line"><span class="comment">// nth-child(n) 选择每个p元素是其父级的第二个子元素</span></span><br><span class="line"><span class="comment">// nth-last-child(n) 选择每个p元素的是其父级的第二个子元素，从最后一个子项计数</span></span><br></pre></td></tr></table></figure>

<h2 id="一些好看的渐变色"><a href="#一些好看的渐变色" class="headerlink" title="一些好看的渐变色"></a>一些好看的渐变色</h2><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="attr">background</span>: linear-<span class="title function_">gradient</span>(#3378ff, #9442fe); <span class="comment">// juicy-peach</span></span><br><span class="line"><span class="attr">background</span>: linear-<span class="title function_">gradient</span>(#9ebbf7, #b4efed); <span class="comment">// ocean-blue</span></span><br><span class="line"><span class="attr">background</span>: linear-<span class="title function_">gradient</span>(#eb4174, #ffe3e3); <span class="comment">// amour</span></span><br><span class="line"><span class="attr">background</span>: linear-<span class="title function_">gradient</span>(#c15cff, #ff5454); <span class="comment">// purple-lake</span></span><br><span class="line"><span class="attr">background</span>: linear-<span class="title function_">gradient</span>(#f9e7fe, #dafcfc); <span class="comment">// almost</span></span><br><span class="line"><span class="attr">background</span>: linear-<span class="title function_">gradient</span>(#8a2eff, #cce0ff); <span class="comment">// plum-plate</span></span><br><span class="line"><span class="attr">background</span>: linear-<span class="title function_">gradient</span>(#9ef9d8, #caf6bf); <span class="comment">// soft-grass</span></span><br><span class="line"><span class="attr">background</span>: linear-<span class="title function_">gradient</span>(#1aa37a, #9dffb3); <span class="comment">// lush</span></span><br></pre></td></tr></table></figure>

<h2 id="有关文字的css样式"><a href="#有关文字的css样式" class="headerlink" title="有关文字的css样式"></a>有关文字的css样式</h2><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">字母换行：word-<span class="attr">wrap</span>: <span class="keyword">break</span>-word;</span><br><span class="line">单词换行：word-<span class="attr">break</span>: <span class="keyword">break</span>-all;</span><br><span class="line">文字换行：white-<span class="attr">space</span>:pre-wrap;</span><br><span class="line">首行缩进：text-<span class="attr">intent</span>: 2em;</span><br></pre></td></tr></table></figure>

<h2 id="grid布局"><a href="#grid布局" class="headerlink" title="grid布局"></a>grid布局</h2><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 什么是grid布局？</span></span><br><span class="line"><span class="comment">// Flex布局是轴线布局，只能指定“项目”针对轴线的位置，可以看作是一维布局，</span></span><br><span class="line"><span class="comment">// Grid布局是将容器划分成“行”和列，产生单元格，然后指定“项目所在”的单元格，</span></span><br><span class="line"><span class="comment">// 可以看作是二维布局，Grid布局远比Flex布局强大</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 容器属性 grid - template -*</span></span><br><span class="line"><span class="comment">// 你想要多少行或者列，就填写相应属性值的个数，不填写，自动分配</span></span><br><span class="line"><span class="comment">// grid-template-columns: 100px 100px 100px;</span></span><br><span class="line"><span class="comment">// grid-template-rows</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 1、repeat()，第一个参数是重复的次数，第二个参数是所要重复的值</span></span><br><span class="line"><span class="comment">// grid-template-columns: repeat(3, 100px);</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 2、auto-fill，有时，单元格的大小是固定的，但是容器的大小不确定，这个属性就会自动填充</span></span><br><span class="line"><span class="comment">// grid-template-columns: repeat(auto-fill, 100px);</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 3、为了方便表示比例关系，网格布局提供了fr关键字(fraction的缩写，意为：“片段”)</span></span><br><span class="line"><span class="comment">// grid-template-columns: repeat(4, 1fr); // 宽度平均分为4份</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 4、minmax(),函数产生一个长度范围，表示长度就在这个范围之中，它接受两个参数，分别为最小值和最大值</span></span><br><span class="line"><span class="comment">// grid-template-columns: 1fr minmax(150px, 1fr);</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 5、auto，表示由浏览器自己决定长度</span></span><br><span class="line"><span class="comment">// grid - template - columns: 100px auto 100px;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 6、网格线，可以用方括号定义网格线名称，方便以后的引用</span></span><br><span class="line"><span class="comment">// grid-template-columns: [c1] 100px [c2] 100px [c3] 100px [c4]</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// grid-row-gap / grid-column-gap</span></span><br><span class="line"><span class="comment">// 一句话解释就是，item(项目)相互之间的距离</span></span><br><span class="line"><span class="comment">// 注意：根据最新标准，上面三个属性名的grid-前缀已经删除，</span></span><br><span class="line"><span class="comment">// grid-column-gap -&gt; column-gap</span></span><br><span class="line"><span class="comment">// grid-row-gap -&gt; row-gap</span></span><br><span class="line"><span class="comment">// grid-gap -&gt;</span></span><br><span class="line"><span class="comment">// grid-template-areas</span></span><br><span class="line"><span class="comment">// 一个区域由单个或多个单元格组成，由你决定（具体使用，需要在项目属性里面设置）</span></span><br><span class="line"><span class="comment">// grid-template-areas: &#x27;a b c&#x27; &#x27;d e f&#x27; &#x27;g h i&#x27;;</span></span><br><span class="line"><span class="comment">// &#x27;a a a&#x27; &#x27;b b b&#x27; &#x27;c c c&#x27;;</span></span><br><span class="line"><span class="comment">// &#x27;a . c&#x27; &#x27;d . f&#x27; &#x27;g . i&#x27;</span></span><br><span class="line"><span class="comment">// 区域不需要利用，则使用点(.)表示</span></span><br><span class="line"><span class="comment">// 区域的命名会影响到网格线。每个区域的起始网格线，会自动命名为区域名-start，</span></span><br><span class="line"><span class="comment">// 终止网格线自动命名为区域名-end</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// grid-auto-flow: row / row dense / column</span></span><br><span class="line"><span class="comment">// 划分网格以后，容器的子元素会按照顺序，自动放置在每一个网格。</span></span><br><span class="line"><span class="comment">// 默认的放置顺序是“先行后列”，即先填满第一行，再开始放入第二行（就是子元素的排放顺序）</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// justify-items(水平方向) / align-items(垂直方向)</span></span><br><span class="line"><span class="comment">// 设置单元格内容的水平和垂直的对齐方式</span></span><br><span class="line"><span class="comment">// justify-items: start | end | center | stretch;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// place-items属性是align-items属性和justify-items属性的合并简写形式</span></span><br><span class="line"><span class="comment">// place-items: &lt;align-items&gt; &lt;justify-items&gt;;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// justify-content(水平方向) / align-content(垂直方向)</span></span><br><span class="line"><span class="comment">// 设置整个内容区域的水平和垂直的对齐方式</span></span><br><span class="line"><span class="comment">// start | end | center | stretch | space-around | space-between | space-evenly;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// grid-auto-columns / grid-auto-rows 用来设置多出来的项目宽和高</span></span><br><span class="line"><span class="comment">// 我只设置了3*3个项目，但是实际有10个，整个属性就是用来设置多出来的项目</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 项目属性</span></span><br><span class="line"><span class="comment">// grid-&#123;column / row&#125;-&#123;start / end&#125;</span></span><br><span class="line"><span class="comment">// 一句话解释，用来指定item的具体位置，根据在哪根网络线</span></span><br><span class="line"><span class="comment">// grid-column-start: 1;</span></span><br><span class="line"><span class="comment">// grid-column-end: 3;</span></span><br><span class="line"><span class="comment">// grid-column-start: span 2;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// grid-area 还可以用作grid-&#123;column / row&#125;-&#123;start / end&#125;的合并简写形式，直接指定项目的位置</span></span><br><span class="line"><span class="comment">// grid-area: &lt;row-start&gt; / &lt;column-start&gt; / &lt;row-end&gt; / &lt;column-end&gt;;</span></span><br><span class="line"><span class="comment">// grid-area: 1 / 1 / 3 / 3;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// &#123;justify / align / place&#125;-self 跟justify-items属性的用法完全一致，但只作用于单个项目</span></span><br></pre></td></tr></table></figure>

<h2 id="px-rpx-em-rem-vw-vh的对比"><a href="#px-rpx-em-rem-vw-vh的对比" class="headerlink" title="px rpx em rem vw &#x2F; vh的对比"></a>px rpx em rem vw &#x2F; vh的对比</h2><p><a target="_blank" rel="noopener" href="https://zhuanlan.zhihu.com/p/396861745">https://zhuanlan.zhihu.com/p/396861745</a></p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// px rpx em rem vw / vh的对比</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment">// px：绝对长度单位，来描述一个元素的宽高以及定位信息</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// rpx：微信小程序独有的、解决屏幕自适应的尺寸单位</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// em：相对单位，基准点为父节点字体的大小，如果自身定义了font - size按自身来计算</span></span><br><span class="line"><span class="comment">// （浏览器默认16px）em作为字体单位，相对于父元素字体大小；em作为行高单位时，</span></span><br><span class="line"><span class="comment">// 相对于自身字体大小，整个页面内 1em 不是一个固定的值。</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// rem：相对单位，可理解为”root em”，相对根节点html的字体大小来计算，</span></span><br><span class="line"><span class="comment">// CSS3新加属性，rem作用于非根元素时，相对于根元素字体大小；rem作用于根元素字体大小时</span></span><br><span class="line"><span class="comment">// ，相对于其出初始字体大小。rem布局的本质是等比缩放，一般是基于宽度，试想一下如果UE图能够等比缩放，那该多么美好啊</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// vw / vh：viewpoint width / viewpoint height，vw 相对于视窗的宽度，vh 相对于视窗的高度，1vw等于视窗宽度的1 %</span></span><br><span class="line"><span class="comment">//   百分比：1 % 对不同属性有不同的含义。 font - size: 200 % 和font - size: 2em 一样，表示字体大小是默认</span></span><br><span class="line"><span class="comment">// （继承自父亲）字体大小的2倍。 line - height: 200 % 表示行高是自己字体大小的 2 倍。</span></span><br><span class="line"><span class="comment">// width: 100 % 表示自己 content 的宽度等于父亲 content 宽度的1倍。</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment">// px 绝对长度单位，根据维基百科解释：它是图像显示的基本单元，既不是一个确定的物理量，</span></span><br><span class="line"><span class="comment">// 也不是一个点或者小方块，而是一个抽象概念。很多时候，px 也常被称为 CSS 像素，</span></span><br><span class="line"><span class="comment">// 在 PC 中，通常认为 1px 的真实长度是固定的</span></span><br><span class="line"><span class="comment">// 那 px 真的是一个设备无关，跟长度单位米和分米一样是固定大小的吗？</span></span><br><span class="line"><span class="comment">// 一个像素表示了计算机屏幕所能显示的最小区域，像素分为两种类型：</span></span><br><span class="line"><span class="comment">// CSS 像素：为 Web 开发者提供，在 CSS 中使用的一个抽象单位</span></span><br><span class="line"><span class="comment">// 物理像素：只与设备的硬件密度有关，任何设备的物理像素都是固定的</span></span><br><span class="line"><span class="comment">// 转换关系：CSS像素 = 物理像素／分辨率</span></span><br><span class="line"><span class="comment">// 假设PC 端：750 * 1134的视觉稿： 1 CSS像素 = 物理像素／分辨率 = 750 ／ 980 = 0.76</span></span><br><span class="line"><span class="comment">// 假设移动端（iphone6为例），分辨率为375 * 667：1 CSS像素 = 物理像素 ／分辨率 = 750 ／ 375 = 2</span></span><br><span class="line"><span class="comment">// 所以 PC 端，一个CSS像素可以用0.76个物理像素来表示，而iphone6中 一个CSS像素表示了2个物理像素。</span></span><br><span class="line"><span class="comment">// 此外不同的移动设备分辨率不同，也就是1个CSS像素可以表示的物理像素是不同的</span></span><br><span class="line"><span class="comment">// 注意，当浏览器页面缩放时，px 并不能跟随变大。当前网页的布局就会被打破。</span></span><br><span class="line"><span class="comment">// rpx 是微信小程序独有的、解决屏幕自适应的尺寸单位</span></span><br><span class="line"><span class="comment">// 可以根据屏幕宽度进行自适应，不论大小屏幕，规定屏幕宽为 750rpx</span></span><br><span class="line"><span class="comment">// 通过 rpx 设置元素和字体的大小，小程序在不同尺寸的屏幕下，可以实现自动适配</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// rpx 和 px之间的区别：</span></span><br><span class="line"><span class="comment">// 在普通网页开发中，最常用的像素单位是px</span></span><br><span class="line"><span class="comment">// 在小程序开发中，推荐使用 rpx 这种响应式的像素单位进行开发</span></span><br><span class="line"><span class="comment">// 设计师在出设计稿的时候，出的都是二倍图，也就是说如果在这个设计稿上有一个宽高为 200px 的盒子，</span></span><br><span class="line"><span class="comment">// 那么它最终画到页面上实际上是一个宽高为 100px 的盒子，那么再换算成 rpx 需要乘以 2 ，</span></span><br><span class="line"><span class="comment">// 就又变成了 200rpx ，跟设计稿上的数字是一样的，所以我们可以保持数字不变，直接将单位 px 替换成 rpx</span></span><br><span class="line"><span class="comment">// em 相对长度单位，em 是相对于当前元素的父元素的 font - size 进行计算, 如果当前元素未设置则相对于浏览器的默认字体尺寸。</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// rem 相对长度单位，CSS3 新增的一个相对单位，rem 是相对于根元素（html）的 font - size 进行计算，</span></span><br><span class="line"><span class="comment">// rem 不仅可设置字体大小，也可以设置元素宽高属性。</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// px 与 rem 的区别：</span></span><br><span class="line"><span class="comment">// px 对于只需要适配少量设备，且分辨率对页面影响不大的，使用 px 即可， px 设置更为精准 。</span></span><br><span class="line"><span class="comment">// 随着 rem 在众多的浏览器都得到支持，有需要考虑到对多设备，</span></span><br><span class="line"><span class="comment">// 多分辨率的自适应，无疑这时候 rem 是最合适的（如：移动端的开发）。</span></span><br><span class="line"><span class="comment">// CSS3 特性 vh 和 vw：</span></span><br><span class="line"><span class="comment">// vh 相对于视窗的高度，视窗高度是100vh</span></span><br><span class="line"><span class="comment">// vw 相对于视窗的宽度，视窗宽度是100vw</span></span><br><span class="line"><span class="comment">// 这里是视窗指的是浏览器内部的可视区域大小，即 window.innerWidth / window.innerHeight 大小，</span></span><br><span class="line"><span class="comment">// 不包含任务栏标题栏以及底部工具栏的浏览器区域大小。</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 百分比</span></span><br><span class="line"><span class="comment">// 通常认为子元素的百分比完全相对于直接父元素：</span></span><br><span class="line"><span class="comment">// 需要注意的是，如果设置了top、margin、padding等：</span></span><br><span class="line"><span class="comment">// 子元素的 top 和 bottom 如果设置百分比，则相对于直接非 static 定位(默认定位)的父元素的高度</span></span><br><span class="line"><span class="comment">// 子元素的 left 和 right 如果设置百分比，则相对于直接非 static 定位(默认定位的)父元素的宽度</span></span><br><span class="line"><span class="comment">// 子元素的 padding/margin 如果设置百分比，不论是垂直方向或者是水平方向，都相对于直接父亲元素的 padding/margin ，而与父元素的 height 无关。</span></span><br><span class="line"></span><br></pre></td></tr></table></figure>

<h2 id="tailwindcss"><a href="#tailwindcss" class="headerlink" title="tailwindcss"></a>tailwindcss</h2><p><a target="_blank" rel="noopener" href="https://www.tailwindcss.cn/docs/word-break">https://www.tailwindcss.cn/docs/word-break</a></p>
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class="line">182</span><br><span class="line">183</span><br><span class="line">184</span><br><span class="line">185</span><br><span class="line">186</span><br><span class="line">187</span><br><span class="line">188</span><br><span class="line">189</span><br><span class="line">190</span><br><span class="line">191</span><br><span class="line">192</span><br><span class="line">193</span><br><span class="line">194</span><br><span class="line">195</span><br><span class="line">196</span><br><span class="line">197</span><br><span class="line">198</span><br><span class="line">199</span><br><span class="line">200</span><br><span class="line">201</span><br><span class="line">202</span><br><span class="line">203</span><br><span class="line">204</span><br><span class="line">205</span><br><span class="line">206</span><br><span class="line">207</span><br><span class="line">208</span><br><span class="line">209</span><br><span class="line">210</span><br><span class="line">211</span><br><span class="line">212</span><br><span class="line">213</span><br><span class="line">214</span><br><span class="line">215</span><br><span class="line">216</span><br><span class="line">217</span><br><span class="line">218</span><br><span class="line">219</span><br><span class="line">220</span><br><span class="line">221</span><br><span class="line">222</span><br><span class="line">223</span><br><span class="line">224</span><br><span class="line">225</span><br><span class="line">226</span><br><span class="line">227</span><br><span class="line">228</span><br><span class="line">229</span><br><span class="line">230</span><br><span class="line">231</span><br><span class="line">232</span><br><span class="line">233</span><br><span class="line">234</span><br><span class="line">235</span><br><span class="line">236</span><br><span class="line">237</span><br><span class="line">238</span><br><span class="line">239</span><br><span class="line">240</span><br><span class="line">241</span><br><span class="line">242</span><br><span class="line">243</span><br><span class="line">244</span><br><span class="line">245</span><br><span class="line">246</span><br><span class="line">247</span><br><span class="line">248</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// flex布局</span></span><br><span class="line"><span class="comment">// flex</span></span><br><span class="line"><span class="comment">// flex-row flex-row-reverse flex-col flex-col-reverse</span></span><br><span class="line"><span class="comment">// flex-wrap flex-wrap-reverse flex-nowrap</span></span><br><span class="line"><span class="comment">// flex-1 flex-auto flex-initial flex-none 控制flex项目放大和缩小的功能类 具体用法得看官网</span></span><br><span class="line"><span class="comment">// flex-grow-0 flex-grow 控制flex项目放大的功能类 具体用法得看官网</span></span><br><span class="line"><span class="comment">// flex-shrink-0 flex-shrink 控制flex项目缩小的功能类 具体用法得看官网</span></span><br><span class="line"><span class="comment">// order-&#123;1~12&#125; order-(first/last/none)</span></span><br><span class="line"><span class="comment">// Grid、Gap 是网格布局相关的东西，还挺不错的，需要的时候去了解了解</span></span><br><span class="line"><span class="comment">// Justify Content: justify-(start/end/center/between/around/evenly)</span></span><br><span class="line"><span class="comment">// Justify Items: justify-items-(start/end/center/stretch)</span></span><br><span class="line"><span class="comment">// Justify Self: justify-self-(auto/start/end/center/stretch)</span></span><br><span class="line"><span class="comment">// Align Content: content-(center/start/end/between/around/evenly)</span></span><br><span class="line"><span class="comment">// Align Items: items-(start/end/center/baseline/stretch)</span></span><br><span class="line"><span class="comment">// Align Self: self-(auto/start/end/center/stretch/baseline)</span></span><br><span class="line"><span class="comment">// Place Content/Items/Self 需要的时候去了解了解</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment">// 布局</span></span><br><span class="line"><span class="comment">// 容器</span></span><br><span class="line"><span class="comment">// Box Decoration Break</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// Box Sizing</span></span><br><span class="line"><span class="comment">// box-(border-content)</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment">// Display (只记了常用的)</span></span><br><span class="line"><span class="comment">// block/inline-block/line/flex/table/hidden display:none</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 浮动</span></span><br><span class="line"><span class="comment">// 清除浮动</span></span><br><span class="line"><span class="comment">// Isolation</span></span><br><span class="line"><span class="comment">// Object Fit/Position</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 溢出</span></span><br><span class="line"><span class="comment">// overflow-(&#x27;&#x27;/x/y)-(auto/hidden/visible/scroll)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// overscroll Behavior</span></span><br><span class="line"><span class="comment">// overscroll-(&#x27;&#x27;/x/y)-(auto/contain/none)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 定位</span></span><br><span class="line"><span class="comment">// static fixed absolute relative sticky</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// Top/Right/Bottom/Left</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/-).inset-(&#x27;&#x27;/x/y)-(0/px/auto/full/&#123;0.5~3.5, 0.5&#125;/&#123;4~11&#125;/12/14/&#123;16~64,4&#125;/72/80/96/(&#123;1~3&#125;/&#123;2~4&#125;))</span></span><br><span class="line"><span class="comment">//(&#x27;&#x27;/-).(top/left/right/bottom)-(与上面相同)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 可见性</span></span><br><span class="line"><span class="comment">// visible / invisible</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// Z-Index</span></span><br><span class="line"><span class="comment">// z-(auto/&#123;0~50,10&#125;)</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment">// 间距</span></span><br><span class="line"><span class="comment">// 内边距</span></span><br><span class="line"><span class="comment">// p-0 padding: 0px</span></span><br><span class="line"><span class="comment">// p-px padding: 1px</span></span><br><span class="line"><span class="comment">// p-&#123;0.5~3.5, 0.5&#125; padding: 0.125rem + 0.125rem + ...</span></span><br><span class="line"><span class="comment">// p-&#123;4~12, 1&#125; padding: 1rem + 0.25rem + ...</span></span><br><span class="line"><span class="comment">// p-&#123;14~16, 2&#125; padding: 3.5rem + 0.5rem</span></span><br><span class="line"><span class="comment">// p-&#123;20~60, 4&#125; padding: 5rem + 1rem</span></span><br><span class="line"><span class="comment">// p-&#123;64-80, 8&#125; padding: 16rem + 2rem</span></span><br><span class="line"><span class="comment">// p-96 padding: 24rem</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 与上面同理依次类推</span></span><br><span class="line"><span class="comment">// px-0 padding-left: 0px; padding-right: 0px;</span></span><br><span class="line"><span class="comment">// py-0 padding-top: 0px; padding-bottom: 0px;</span></span><br><span class="line"><span class="comment">// pt-0 pr-0 pl-0 pb-0 padding-top/right/left/bottom: 0px</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 外边距</span></span><br><span class="line"><span class="comment">// 与内边距的同理，把p改为了m，并且使得外边距有负值</span></span><br><span class="line"><span class="comment">// -m-px margin: -1px</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// Space Between 用于控制子元素之间的间隔的功能类，后面需要了再了解</span></span><br><span class="line"><span class="comment">// 尺寸</span></span><br><span class="line"><span class="comment">// 宽度</span></span><br><span class="line"><span class="comment">// 与内边距的同理，把p改为了w，多加了百分比属性和其他</span></span><br><span class="line"><span class="comment">// w-auto width: auto;</span></span><br><span class="line"><span class="comment">// w-&#123;(1-11)/(2-12)&#125; 分子不能大于或等于分母</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// w-full width: 100%;</span></span><br><span class="line"><span class="comment">// w-screen width: 100vw;</span></span><br><span class="line"><span class="comment">// w-min width: min-content;</span></span><br><span class="line"><span class="comment">// w-max width: max-content;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 最小宽度</span></span><br><span class="line"><span class="comment">// min-w-0 min-width: 0px</span></span><br><span class="line"><span class="comment">// min-w-full min-width: 100%;</span></span><br><span class="line"><span class="comment">// min-w-min min-width: min-content;</span></span><br><span class="line"><span class="comment">// min-w-max min-width: max-content;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 最大宽度就不在这做过多的理解了，以后需要的时候再来</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 高度</span></span><br><span class="line"><span class="comment">// 与宽度的区别就在于 其他 那边</span></span><br><span class="line"><span class="comment">// h-full height: 100%</span></span><br><span class="line"><span class="comment">// h-screen height: 100%</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 最小高度就是在上面四项中的第三第四换成了</span></span><br><span class="line"><span class="comment">// min-h-screen: min-height: 100vh</span></span><br><span class="line"><span class="comment">// 最大高度就不在这做过多的理解了，以后需要的时候再来</span></span><br><span class="line"><span class="comment">// 背景</span></span><br><span class="line"><span class="comment">// 背景图像固定</span></span><br><span class="line"><span class="comment">// bg-fixed/local/scroll background-attachment: fixed/local/scroll</span></span><br><span class="line"><span class="comment">// 背景图像剪裁</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 背景颜色</span></span><br><span class="line"><span class="comment">// bg-transparent bg-current bg-black bg-white</span></span><br><span class="line"><span class="comment">// bg-(gray,red,yellow,green,blue,indigo浅蓝,purple,pink)-(50 100~900)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 背景颜色不透明度</span></span><br><span class="line"><span class="comment">// bg-opacity-&#123;0~100, 5&#125;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// Background Origin 暂时不做了解</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 背景图片位置</span></span><br><span class="line"><span class="comment">// bg-bottom/top/left/right/center/(left/right-bottom/top)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 背景图像重复</span></span><br><span class="line"><span class="comment">// bg-repeat/no-repeat/repeat-(x/y)/-repeat-round/repeat-space</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 背景图像大小</span></span><br><span class="line"><span class="comment">// bg-auto/cover/contain</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 背景图像</span></span><br><span class="line"><span class="comment">// bg-none</span></span><br><span class="line"><span class="comment">// bg-gradient-to-(t/tr/r/br/b/bl/l/tl)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 渐变色停止后面再了解了</span></span><br><span class="line"><span class="comment">// 排版</span></span><br><span class="line"><span class="comment">// 字体序列 / 大小 / 平滑度 / 样式 / 粗细 / 间距</span></span><br><span class="line"><span class="comment">// font-(sans/serif/mono)</span></span><br><span class="line"><span class="comment">// text-(xs/sm/base/lg/xl/&#123;2xl~9xl&#125;)</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/subpixel)-antialiased</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/not)-italic</span></span><br><span class="line"><span class="comment">//font-(thin/extralight/light/normal/medium/semibold/bold/extrabold/black)</span></span><br><span class="line"><span class="comment">// tracking(tighter/tight/norml/wide/wider/widest)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// Font Variant Numeric 用来控制数字变形的功能类 后续需要在了解</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 行高</span></span><br><span class="line"><span class="comment">// leading-(&#123;3~10&#125;/none/tight/snug/normal/relaxed/loose)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 列表项标记类型 / 位置</span></span><br><span class="line"><span class="comment">// list-(none/disc/decimal)</span></span><br><span class="line"><span class="comment">// list-(inside/outside)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 占位文本颜色 / 不透明度</span></span><br><span class="line"><span class="comment">// placeholder-(color具有的全部属性)::placeholder</span></span><br><span class="line"><span class="comment">// placeholder-opacity-(不透明的具有的全部属性)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 文本对齐 / 颜色 / 颜色不透明度 / 装饰 / 转换 / 溢出</span></span><br><span class="line"><span class="comment">// text-(left/center/right/justify)</span></span><br><span class="line"><span class="comment">// text-(color具有的全部属性)</span></span><br><span class="line"><span class="comment">// text-opacity-(不透明的具有的全部属性)</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/no)-underline/line-through</span></span><br><span class="line"><span class="comment">// uppercase全部大写/lowercase全部小写/capitalize每个单词首字母大写/normal-case</span></span><br><span class="line"><span class="comment">// truncate/overflow-(ellipsis/clip)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 垂直对齐</span></span><br><span class="line"><span class="comment">// align-(baseline/top/middle/bottom/text-(top/bottom))</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 空格</span></span><br><span class="line"><span class="comment">// whitespace-(normal/nowrap/pre-(&#x27;&#x27;/line/wrap))</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 文本换行</span></span><br><span class="line"><span class="comment">// break-(normal/words/all)</span></span><br><span class="line"><span class="comment">// 边框圆角</span></span><br><span class="line"><span class="comment">// rounded-none border-radius:0px</span></span><br><span class="line"><span class="comment">// rounded-(sm/&#x27;&#x27;/md) 0.125/0.25/0.375rem</span></span><br><span class="line"><span class="comment">// rounded-(lg/xl/2xl/3xl) 0.5/0.75/1/1.5rem</span></span><br><span class="line"><span class="comment">// rounded-full 9999px</span></span><br><span class="line"><span class="comment">// 然后就是扩展</span></span><br><span class="line"><span class="comment">// rounded-t/b/r/l/tb/tr/tl/br/bl</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 边框厚度</span></span><br><span class="line"><span class="comment">// 边框颜色</span></span><br><span class="line"><span class="comment">// 边框不透明度</span></span><br><span class="line"><span class="comment">// 边框样式</span></span><br><span class="line"><span class="comment">// 分隔线厚度</span></span><br><span class="line"><span class="comment">// 分隔线颜色</span></span><br><span class="line"><span class="comment">// 分隔线不透明度</span></span><br><span class="line"><span class="comment">// 分隔线样式</span></span><br><span class="line"><span class="comment">// 轮廓环厚度、颜色、不透明度、偏移厚度和颜色</span></span><br><span class="line"><span class="comment">// 转换</span></span><br><span class="line"><span class="comment">// 变换</span></span><br><span class="line"><span class="comment">// transform-(&#x27;&#x27;/gpu/none)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 变换原点</span></span><br><span class="line"><span class="comment">// origin-(center/top/right/left/(top/bottom-left/right))</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 缩放</span></span><br><span class="line"><span class="comment">// scale-(&#x27;&#x27;/x/y)-(0/50/75/90/95/100/105/110/125/150)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 旋转</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/-)rotate-(&#123;0~3&#125;/6/12/45/90/180)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 平移</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/-)translate-(x/y)-(0/px/full)</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/-)translate-(x/y)-(&#123;0.5~3.5, .5&#125;/&#123;4~11&#125;/12/16/&#123;20~60, 4&#125;/72/80/96)</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/-)translate-(x/y)-(&#123;1~3&#125;/&#123;2~4&#125;) 分子不能大于分母</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 倾斜</span></span><br><span class="line"><span class="comment">// (&#x27;&#x27;/-)skew-(x/y)-(0/1/2/3/6/12)</span></span><br><span class="line"><span class="comment">// effects</span></span><br><span class="line"><span class="comment">// 盒阴影 shadow-(sm/&#x27;&#x27;/md/lg/xl/2xl/inner/none)</span></span><br><span class="line"><span class="comment">// 不透明度 类似背景透明度写法</span></span><br><span class="line"><span class="comment">// Mix Blend Mode</span></span><br><span class="line"><span class="comment">// Background Blend Mode</span></span><br><span class="line"><span class="comment">// transitions and animation</span></span><br><span class="line"><span class="comment">// 过渡属性</span></span><br><span class="line"><span class="comment">// transition-(none/all/&#x27;&#x27;/colors/opacity/shadow/transform)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 过渡持续时间</span></span><br><span class="line"><span class="comment">// duration-(75/100/150/200/300/500/700/1000)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 过渡计时函数</span></span><br><span class="line"><span class="comment">// ease-(linear/in/out/in-out)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 过渡延迟</span></span><br><span class="line"><span class="comment">//delay-(与过渡持续时间一样)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 动画</span></span><br><span class="line"><span class="comment">// animate-(none/spin旋转/ping雷达/pulse脉冲/bounce反弹)</span></span><br><span class="line"><span class="comment">// tables</span></span><br><span class="line"><span class="comment">// 表格边框</span></span><br><span class="line"><span class="comment">// border-collapse 将相邻的单元格边框合并为一个边框</span></span><br><span class="line"><span class="comment">// border-separate 强制每个单元格显示自己的独立边框</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 表格布局</span></span><br><span class="line"><span class="comment">// table-auto  允许表格自动调整列的大小以适应单元格的内容。</span></span><br><span class="line"><span class="comment">// table-fixed 允许表格忽略内容，使用固定的列宽</span></span><br><span class="line"><span class="comment">// filters</span></span><br><span class="line"><span class="comment">// 暂时不做过多了解</span></span><br><span class="line"><span class="comment">// Filter</span></span><br><span class="line"><span class="comment">// Blur</span></span><br><span class="line"><span class="comment">// Brightness</span></span><br><span class="line"><span class="comment">// Contrast</span></span><br><span class="line"><span class="comment">// Drop Shadow</span></span><br><span class="line"><span class="comment">// Grayscale</span></span><br><span class="line"><span class="comment">// Hue Rotate</span></span><br><span class="line"><span class="comment">// Invert</span></span><br><span class="line"><span class="comment">// Saturate</span></span><br><span class="line"><span class="comment">// Sepia</span></span><br><span class="line"><span class="comment">//Backdrop ... 与上面一样</span></span><br></pre></td></tr></table></figure>
<h2 id="vue3学习笔记之样式穿透-deep-及CSS-新特性-soltted、-gloabl、v-bind、mouldCSS"><a href="#vue3学习笔记之样式穿透-deep-及CSS-新特性-soltted、-gloabl、v-bind、mouldCSS" class="headerlink" title="vue3学习笔记之样式穿透(:deep)及CSS 新特性(:soltted、:gloabl、v-bind、mouldCSS)"></a>vue3学习笔记之样式穿透(:deep)及CSS 新特性(:soltted、:gloabl、v-bind、mouldCSS)</h2><p><a target="_blank" rel="noopener" href="https://blog.csdn.net/wgh4318/article/details/128711849">https://blog.csdn.net/wgh4318/article/details/128711849</a><br><a target="_blank" rel="noopener" href="https://blog.csdn.net/weixin_44171757/article/details/134095117">https://blog.csdn.net/weixin_44171757/article/details/134095117</a></p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line">&lt;script setup lang=<span class="string">&quot;ts&quot;</span>&gt;</span><br><span class="line">  <span class="comment">// 动态css（v-bind）</span></span><br><span class="line">  <span class="keyword">const</span> redColor = <span class="title function_">ref</span>(<span class="string">&#x27;red&#x27;</span>)</span><br><span class="line">  <span class="keyword">const</span> color = <span class="title function_">ref</span>(&#123;</span><br><span class="line">    <span class="attr">red</span>: <span class="string">&#x27;red&#x27;</span>,</span><br><span class="line">    <span class="attr">green</span>: <span class="string">&#x27;green&#x27;</span></span><br><span class="line">  &#125;)</span><br><span class="line">&lt;/script&gt;</span><br><span class="line"></span><br><span class="line"><span class="language-xml"><span class="tag">&lt;<span class="name">style</span> <span class="attr">lang</span>=<span class="string">&quot;less&quot;</span> <span class="attr">scoped</span>&gt;</span></span></span><br><span class="line"><span class="language-xml">  .box &#123;</span></span><br><span class="line"><span class="language-xml">    color: v-bind(redColor);</span></span><br><span class="line"><span class="language-xml">    background: v-bind(&#x27;color.green&#x27;); // 对象要加 &#x27;&#x27;</span></span><br><span class="line"><span class="language-xml">  &#125;</span></span><br><span class="line"><span class="language-xml"><span class="tag">&lt;/<span class="name">style</span>&gt;</span></span></span><br></pre></td></tr></table></figure>


<h2 id="白天和夜间模式切换"><a href="#白天和夜间模式切换" class="headerlink" title="白天和夜间模式切换"></a>白天和夜间模式切换</h2><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br><span class="line">131</span><br><span class="line">132</span><br><span class="line">133</span><br><span class="line">134</span><br><span class="line">135</span><br></pre></td><td class="code"><pre><span class="line">&lt;!<span class="variable constant_">DOCTYPE</span> html&gt;</span><br><span class="line">&lt;html lang=&quot;en&quot;&gt;</span><br><span class="line"></span><br><span class="line">&lt;head&gt;</span><br><span class="line">  &lt;meta charset=&quot;UTF-8&quot;&gt;</span><br><span class="line">  &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1.0&quot;&gt;</span><br><span class="line">  &lt;title&gt;Document&lt;/title&gt;</span><br><span class="line">&lt;/head&gt;</span><br><span class="line">&lt;style&gt;</span><br><span class="line">  .btn &#123;</span><br><span class="line">    color: var(--bg-color);</span><br><span class="line">    background-color: var(--btn-color);</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  :root &#123;</span><br><span class="line">    --text-color: #000;</span><br><span class="line">    --bg-color: #fff;</span><br><span class="line">    --btn-color: red;</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  :root.dark &#123;</span><br><span class="line">    --text-color: #fff;</span><br><span class="line">    --bg-color: #000;</span><br><span class="line">    --btn-color: yellow;</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  body &#123;</span><br><span class="line">    background-color: var(--bg-color);</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  .text &#123;</span><br><span class="line">    color: var(--text-color);</span><br><span class="line">  &#125;</span><br><span class="line">&lt;/style&gt;</span><br><span class="line"></span><br><span class="line">&lt;body&gt;</span><br><span class="line">  &lt;button class=&quot;btn&quot; onclick=&quot;changeColor()&quot;&gt;切换&lt;/button&gt;</span><br><span class="line">  &lt;p class=&quot;text&quot;&gt;hello&lt;/p&gt;</span><br><span class="line">&lt;/body&gt;</span><br><span class="line">&lt;script&gt;</span><br><span class="line">  function changeColor() &#123;</span><br><span class="line">    let color = document.getElementsByTagName(&#x27;html&#x27;)[0].className;</span><br><span class="line">    console.log(color, &#x27;color&#x27;)</span><br><span class="line">    document.getElementsByTagName(&#x27;html&#x27;)[0].className = color === &#x27;dark&#x27; ? &#x27;&#x27; : &#x27;dark&#x27;</span><br><span class="line">  &#125;</span><br><span class="line">&lt;/script&gt;</span><br><span class="line"></span><br><span class="line">&lt;/html&gt;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">&lt;!DOCTYPE html&gt;</span><br><span class="line">&lt;html&gt;</span><br><span class="line"></span><br><span class="line">&lt;head&gt;</span><br><span class="line">  &lt;meta charset=&quot;UTF-8&quot; /&gt;</span><br><span class="line">  &lt;title&gt;前端夜间模式切换&lt;/title&gt;</span><br><span class="line">  &lt;style&gt;</span><br><span class="line">    /* 定义白天模式的样式 */</span><br><span class="line">    :root &#123;</span><br><span class="line">      --bg-color: #fff;</span><br><span class="line">      --text-color: #333;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    /* 定义夜间模式的样式 */</span><br><span class="line">    :root.theme-dark &#123;</span><br><span class="line">      --bg-color: #333;</span><br><span class="line">      --text-color: #fff;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    /* 定义页面的背景色和文本颜色 */</span><br><span class="line">    body &#123;</span><br><span class="line">      background-color: var(--bg-color);</span><br><span class="line">      color: var(--text-color);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    /* 定义切换按钮的样式 */</span><br><span class="line">    #toggle-btn &#123;</span><br><span class="line">      position: fixed;</span><br><span class="line">      top: 20px;</span><br><span class="line">      right: 20px;</span><br><span class="line">      padding: 10px;</span><br><span class="line">      background-color: var(--bg-color);</span><br><span class="line">      color: var(--text-color);</span><br><span class="line">      border: 1px solid var(--text-color);</span><br><span class="line">      cursor: pointer;</span><br><span class="line">    &#125;</span><br><span class="line">  &lt;/style&gt;</span><br><span class="line">&lt;/head&gt;</span><br><span class="line"></span><br><span class="line">&lt;body&gt;</span><br><span class="line">  &lt;h1&gt;前端夜间模式切换&lt;/h1&gt;</span><br><span class="line">  &lt;p&gt;这是一个前端夜间模式切换的示例页面。&lt;/p&gt;</span><br><span class="line">  &lt;button id=&quot;toggle-btn&quot;&gt;切换主题&lt;/button&gt;</span><br><span class="line">  &lt;script&gt;</span><br><span class="line">    // 定义一个切换主题的函数</span><br><span class="line">    function toggleTheme() &#123;</span><br><span class="line">      // 获取页面上的根元素</span><br><span class="line">      const root = document.documentElement;</span><br><span class="line">      // 判断当前主题是白天还是夜晚</span><br><span class="line">      if (root.classList.contains(&#x27;theme-light&#x27;)) &#123;</span><br><span class="line">        // 切换到夜间模式</span><br><span class="line">        root.classList.remove(&#x27;theme-light&#x27;);</span><br><span class="line">        root.classList.add(&#x27;theme-dark&#x27;);</span><br><span class="line">      &#125; else &#123;</span><br><span class="line">        // 切换到白天模式</span><br><span class="line">        root.classList.remove(&#x27;theme-dark&#x27;);</span><br><span class="line">        root.classList.add(&#x27;theme-light&#x27;);</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    // 根据当前时间判断是否需要切换主题</span><br><span class="line">    function checkTime() &#123;</span><br><span class="line">      const now = new Date();</span><br><span class="line">      const hour = now.getHours();</span><br><span class="line">      // 如果当前时间在晚上 8 点到早上 6 点之间，切换到夜间模式</span><br><span class="line">      if (hour &gt;= 20 || hour &lt; 6) &#123;</span><br><span class="line">        document.documentElement.classList.add(&#x27;theme-dark&#x27;);</span><br><span class="line">      &#125; else &#123;</span><br><span class="line">        document.documentElement.classList.remove(&#x27;theme-dark&#x27;);</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    // 监听切换按钮的点击事件</span><br><span class="line">    const toggleBtn = document.querySelector(&#x27;#toggle-btn&#x27;);</span><br><span class="line">    toggleBtn.addEventListener(&#x27;click&#x27;, toggleTheme);</span><br><span class="line"></span><br><span class="line">    // 每隔一分钟检查一次时间，判断是否需要切换主题</span><br><span class="line">    setInterval(checkTime, 60000);</span><br><span class="line"></span><br><span class="line">    // 页面加载时检查一次时间，判断是否需要切换主题</span><br><span class="line">    checkTime();</span><br><span class="line">  &lt;/script&gt;</span><br><span class="line">&lt;/body&gt;</span><br><span class="line"></span><br><span class="line">&lt;/html&gt;</span><br></pre></td></tr></table></figure>


<h2 id="添加省略号"><a href="#添加省略号" class="headerlink" title="添加省略号"></a>添加省略号</h2><p><a target="_blank" rel="noopener" href="https://blog.csdn.net/Ares5kong/article/details/115522730">https://blog.csdn.net/Ares5kong/article/details/115522730</a></p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">.<span class="property">ellipsis</span>-<span class="number">1</span> &#123;</span><br><span class="line">  white-<span class="attr">space</span>: nowrap;</span><br><span class="line">  <span class="attr">overflow</span>: hidden;</span><br><span class="line">  text-<span class="attr">overflow</span>: ellipsis;</span><br><span class="line">&#125;</span><br><span class="line">.<span class="property">ellipsis</span>-<span class="number">4</span> &#123;</span><br><span class="line">  <span class="attr">overflow</span>: hidden;</span><br><span class="line">  text-<span class="attr">overflow</span>: ellipsis;</span><br><span class="line">  <span class="attr">display</span>: -webkit-box;</span><br><span class="line">  -webkit-line-<span class="attr">clamp</span>: <span class="number">4</span>;</span><br><span class="line">  -webkit-box-<span class="attr">orient</span>: vertical;</span><br><span class="line">&#125;</span><br><span class="line"></span><br></pre></td></tr></table></figure>
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        <ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%BC%AA%E5%85%83%E7%B4%A0"><span class="toc-text">伪元素</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%80%E4%BA%9B%E5%A5%BD%E7%9C%8B%E7%9A%84%E6%B8%90%E5%8F%98%E8%89%B2"><span class="toc-text">一些好看的渐变色</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E6%9C%89%E5%85%B3%E6%96%87%E5%AD%97%E7%9A%84css%E6%A0%B7%E5%BC%8F"><span class="toc-text">有关文字的css样式</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#grid%E5%B8%83%E5%B1%80"><span class="toc-text">grid布局</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#px-rpx-em-rem-vw-vh%E7%9A%84%E5%AF%B9%E6%AF%94"><span class="toc-text">px rpx em rem vw &#x2F; vh的对比</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#tailwindcss"><span class="toc-text">tailwindcss</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#vue3%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0%E4%B9%8B%E6%A0%B7%E5%BC%8F%E7%A9%BF%E9%80%8F-deep-%E5%8F%8ACSS-%E6%96%B0%E7%89%B9%E6%80%A7-soltted%E3%80%81-gloabl%E3%80%81v-bind%E3%80%81mouldCSS"><span class="toc-text">vue3学习笔记之样式穿透(:deep)及CSS 新特性(:soltted、:gloabl、v-bind、mouldCSS)</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E7%99%BD%E5%A4%A9%E5%92%8C%E5%A4%9C%E9%97%B4%E6%A8%A1%E5%BC%8F%E5%88%87%E6%8D%A2"><span class="toc-text">白天和夜间模式切换</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E6%B7%BB%E5%8A%A0%E7%9C%81%E7%95%A5%E5%8F%B7"><span class="toc-text">添加省略号</span></a></li></ol>
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<script>
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    script.setAttribute('data-theme', volantis.giscus.Theme);
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  function dark_giscus() {
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    let queryText = decodeURI(window.location.search)
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  function pjax_swiper() {
    volantis.swiper = new Swiper('.swiper-container', {
      slidesPerView: 'auto',
      spaceBetween: 8,
      centeredSlides: true,
      loop: true,
      pagination: {
        el: '.swiper-pagination',
        clickable: true,
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      navigation: {
        nextEl: '.swiper-button-next',
        prevEl: '.swiper-button-prev',
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<pjax>

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    const sections = [...navItems].map((element) => {
      const link = element.querySelector(".toc-link");
      const target = document.getElementById(
        decodeURI(link.getAttribute("href")).replace("#", "")
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      targets.push(target)
      // 解除 a 标签 href 的 锚点定位, a 标签 href 的 锚点定位 会随机启用?? 产生错位???
      link.setAttribute("onclick","return false;")
      link.setAttribute("toc-action","toc-"+decodeURI(link.getAttribute("href")).replace("#", ""))
      link.setAttribute("href","/")
      // 配置 点击 触发新的锚点定位
      link.addEventListener("click", (event) => {
        event.preventDefault();
        // 这里的 addTop 是通过错位使得 toc 自动展开.
        volantis.scroll.to(target,{addTop: 5, observer:true})
        // Anchor id
        history.pushState(null, document.title, "#" + target.id);
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    function activateNavByIndex(target) {
      if (target.classList.contains("active-current")) return;

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  pjax重载区域接口：
  1.  <pjax></pjax> 标签 pjax 标签必须存在于所有页面 否则 pjax error
  2.  script[data-pjax]
  3.  .pjax-reload script
  4.  .pjax
-->



<script src="https://unpkg.com/volantis-static@0.0.1654736714924/libs/pjax/pjax.min.js"></script>


<script>
    var pjax;
    document.addEventListener('DOMContentLoaded', function () {
      pjax = new Pjax({
        elements: 'a[href]:not([href^="#"]):not([href="javascript:void(0)"]):not([pjax-fancybox]):not([onclick="return false;"]):not([onclick="return!1"]):not([target="_blank"]):not([target="view_window"]):not([href$=".xml"])',
        selectors: [
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          "head meta[name=keywords]",
          "head meta[name=description]",
          
          "#l_main",
          "#pjax-header-nav-list",
          ".pjax",
          "pjax", // <pjax></pjax> 标签
          "script[data-pjax], .pjax-reload script" // script标签添加data-pjax 或 script标签外层添加.pjax-reload 的script代码段重载
        ],
        cacheBust: false,   // url 地址追加时间戳，用以避免浏览器缓存
        timeout: 5000,
        
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    document.addEventListener('pjax:send', function (e) {
      //window.stop(); // 相当于点击了浏览器的停止按钮

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        var banUrl = [""];
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      volantis.pjax.method.send.start();
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    document.addEventListener('pjax:complete', function () {
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    document.addEventListener('pjax:error', function (e) {
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    </div>
    <!-- import body_end begin-->
    <!-- import body_end end-->
    <!-- Custom Files bodyEnd begin-->
    
    <!-- Custom Files bodyEnd end-->
    <!-- front-matter body_end begin -->
    <!-- front-matter body_end end -->
  </body>
</html>
